Home / 28,425.10-39,226.94-15,678.83

Finding the Fourth Proportional to 28,425.10, 39,226.94 and 15,678.83

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Solution

The fourth proportional to 28,425.10, 39,226.94 and 15,678.83 is: 21,636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.10 : 39,226.94 = 15,678.83 : x
  2. Step 2: Convert to fraction form
    28,425.10/39,226.94 = 15,678.83/x
  3. Step 3: Cross multiply
    28,425.10x = 39,226.94 × 15,678.83
  4. Step 4: Simplify right side
    28,425.10x = 615,032,445.29
  5. Step 5: Solve for x
    x = 615,032,445.29/28,425.10
  6. Step 6: Final answer
    x = 21,636.95

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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.