Home / 15,278.60-21,055.92-11,916.12

Finding the Fourth Proportional to 15,278.60, 21,055.92 and 11,916.12

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Solution

The fourth proportional to 15,278.60, 21,055.92 and 11,916.12 is: 16,421.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.60 : 21,055.92 = 11,916.12 : x
  2. Step 2: Convert to fraction form
    15,278.60/21,055.92 = 11,916.12/x
  3. Step 3: Cross multiply
    15,278.60x = 21,055.92 × 11,916.12
  4. Step 4: Simplify right side
    15,278.60x = 250,904,869.43
  5. Step 5: Solve for x
    x = 250,904,869.43/15,278.60
  6. Step 6: Final answer
    x = 16,421.98

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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.