Home / 28,263.60-39,000.96-15,687

Finding the Fourth Proportional to 28,263.60, 39,000.96 and 15,687

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Solution

The fourth proportional to 28,263.60, 39,000.96 and 15,687 is: 21,646.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,263.60 : 39,000.96 = 15,687 : x
  2. Step 2: Convert to fraction form
    28,263.60/39,000.96 = 15,687/x
  3. Step 3: Cross multiply
    28,263.60x = 39,000.96 × 15,687
  4. Step 4: Simplify right side
    28,263.60x = 611,808,059.52
  5. Step 5: Solve for x
    x = 611,808,059.52/28,263.60
  6. Step 6: Final answer
    x = 21,646.50

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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.