Home / 28,421.52-42,619.32-13,637.40

Finding the Fourth Proportional to 28,421.52, 42,619.32 and 13,637.40

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Solution

The fourth proportional to 28,421.52, 42,619.32 and 13,637.40 is: 20,449.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.52 : 42,619.32 = 13,637.40 : x
  2. Step 2: Convert to fraction form
    28,421.52/42,619.32 = 13,637.40/x
  3. Step 3: Cross multiply
    28,421.52x = 42,619.32 × 13,637.40
  4. Step 4: Simplify right side
    28,421.52x = 581,216,646.38
  5. Step 5: Solve for x
    x = 581,216,646.38/28,421.52
  6. Step 6: Final answer
    x = 20,449.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.