Home / 28,387.12-42,544.45-12,587.62

Finding the Fourth Proportional to 28,387.12, 42,544.45 and 12,587.62

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Solution

The fourth proportional to 28,387.12, 42,544.45 and 12,587.62 is: 18,865.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.12 : 42,544.45 = 12,587.62 : x
  2. Step 2: Convert to fraction form
    28,387.12/42,544.45 = 12,587.62/x
  3. Step 3: Cross multiply
    28,387.12x = 42,544.45 × 12,587.62
  4. Step 4: Simplify right side
    28,387.12x = 535,533,369.71
  5. Step 5: Solve for x
    x = 535,533,369.71/28,387.12
  6. Step 6: Final answer
    x = 18,865.36

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1.5x scale

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.