Home / 28,309.40-42,464.10-15,187.40

Finding the Fourth Proportional to 28,309.40, 42,464.10 and 15,187.40

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Solution

The fourth proportional to 28,309.40, 42,464.10 and 15,187.40 is: 22,781.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.40 : 42,464.10 = 15,187.40 : x
  2. Step 2: Convert to fraction form
    28,309.40/42,464.10 = 15,187.40/x
  3. Step 3: Cross multiply
    28,309.40x = 42,464.10 × 15,187.40
  4. Step 4: Simplify right side
    28,309.40x = 644,919,272.34
  5. Step 5: Solve for x
    x = 644,919,272.34/28,309.40
  6. Step 6: Final answer
    x = 22,781.10

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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.