Home / 15,503.12-21,397.28-8,788.78

Finding the Fourth Proportional to 15,503.12, 21,397.28 and 8,788.78

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Solution

The fourth proportional to 15,503.12, 21,397.28 and 8,788.78 is: 12,130.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.12 : 21,397.28 = 8,788.78 : x
  2. Step 2: Convert to fraction form
    15,503.12/21,397.28 = 8,788.78/x
  3. Step 3: Cross multiply
    15,503.12x = 21,397.28 × 8,788.78
  4. Step 4: Simplify right side
    15,503.12x = 188,055,881.92
  5. Step 5: Solve for x
    x = 188,055,881.92/15,503.12
  6. Step 6: Final answer
    x = 12,130.19

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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.