Home / 28,404.64-39,200.12-15,657.81

Finding the Fourth Proportional to 28,404.64, 39,200.12 and 15,657.81

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Solution

The fourth proportional to 28,404.64, 39,200.12 and 15,657.81 is: 21,608.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.64 : 39,200.12 = 15,657.81 : x
  2. Step 2: Convert to fraction form
    28,404.64/39,200.12 = 15,657.81/x
  3. Step 3: Cross multiply
    28,404.64x = 39,200.12 × 15,657.81
  4. Step 4: Simplify right side
    28,404.64x = 613,788,030.94
  5. Step 5: Solve for x
    x = 613,788,030.94/28,404.64
  6. Step 6: Final answer
    x = 21,608.72

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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.