Home / 28,439.12-39,248.46-15,693.50

Finding the Fourth Proportional to 28,439.12, 39,248.46 and 15,693.50

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Solution

The fourth proportional to 28,439.12, 39,248.46 and 15,693.50 is: 21,658.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.12 : 39,248.46 = 15,693.50 : x
  2. Step 2: Convert to fraction form
    28,439.12/39,248.46 = 15,693.50/x
  3. Step 3: Cross multiply
    28,439.12x = 39,248.46 × 15,693.50
  4. Step 4: Simplify right side
    28,439.12x = 615,945,510.77
  5. Step 5: Solve for x
    x = 615,945,510.77/28,439.12
  6. Step 6: Final answer
    x = 21,658.39

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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.