Home / 28,686.10-39,587.28-15,940.42

Finding the Fourth Proportional to 28,686.10, 39,587.28 and 15,940.42

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Solution

The fourth proportional to 28,686.10, 39,587.28 and 15,940.42 is: 21,998.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.10 : 39,587.28 = 15,940.42 : x
  2. Step 2: Convert to fraction form
    28,686.10/39,587.28 = 15,940.42/x
  3. Step 3: Cross multiply
    28,686.10x = 39,587.28 × 15,940.42
  4. Step 4: Simplify right side
    28,686.10x = 631,037,869.86
  5. Step 5: Solve for x
    x = 631,037,869.86/28,686.10
  6. Step 6: Final answer
    x = 21,998.04

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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.