Home / 15,386.36-21,233.15-8,312.76

Finding the Fourth Proportional to 15,386.36, 21,233.15 and 8,312.76

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Solution

The fourth proportional to 15,386.36, 21,233.15 and 8,312.76 is: 11,471.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.36 : 21,233.15 = 8,312.76 : x
  2. Step 2: Convert to fraction form
    15,386.36/21,233.15 = 8,312.76/x
  3. Step 3: Cross multiply
    15,386.36x = 21,233.15 × 8,312.76
  4. Step 4: Simplify right side
    15,386.36x = 176,506,079.99
  5. Step 5: Solve for x
    x = 176,506,079.99/15,386.36
  6. Step 6: Final answer
    x = 11,471.59

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Half scale
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Double scale
Find fourth proportional to 15,387.36, 21,234.53 and 8,313.76
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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.