Home / 15,519.32-21,416.76-8,445.74

Finding the Fourth Proportional to 15,519.32, 21,416.76 and 8,445.74

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Solution

The fourth proportional to 15,519.32, 21,416.76 and 8,445.74 is: 11,655.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519.32 : 21,416.76 = 8,445.74 : x
  2. Step 2: Convert to fraction form
    15,519.32/21,416.76 = 8,445.74/x
  3. Step 3: Cross multiply
    15,519.32x = 21,416.76 × 8,445.74
  4. Step 4: Simplify right side
    15,519.32x = 180,880,386.60
  5. Step 5: Solve for x
    x = 180,880,386.60/15,519.32
  6. Step 6: Final answer
    x = 11,655.17

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Half scale
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Double scale
Find fourth proportional to 15,520.32, 21,418.14 and 8,446.74
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.