Home / 15,503.76-21,395.16-8,430.12

Finding the Fourth Proportional to 15,503.76, 21,395.16 and 8,430.12

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Solution

The fourth proportional to 15,503.76, 21,395.16 and 8,430.12 is: 11,633.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.76 : 21,395.16 = 8,430.12 : x
  2. Step 2: Convert to fraction form
    15,503.76/21,395.16 = 8,430.12/x
  3. Step 3: Cross multiply
    15,503.76x = 21,395.16 × 8,430.12
  4. Step 4: Simplify right side
    15,503.76x = 180,363,766.22
  5. Step 5: Solve for x
    x = 180,363,766.22/15,503.76
  6. Step 6: Final answer
    x = 11,633.55

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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.