Home / 28,253.10-42,331.05-18,387.30

Finding the Fourth Proportional to 28,253.10, 42,331.05 and 18,387.30

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Solution

The fourth proportional to 28,253.10, 42,331.05 and 18,387.30 is: 27,549.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.10 : 42,331.05 = 18,387.30 : x
  2. Step 2: Convert to fraction form
    28,253.10/42,331.05 = 18,387.30/x
  3. Step 3: Cross multiply
    28,253.10x = 42,331.05 × 18,387.30
  4. Step 4: Simplify right side
    28,253.10x = 778,353,715.67
  5. Step 5: Solve for x
    x = 778,353,715.67/28,253.10
  6. Step 6: Final answer
    x = 27,549.32

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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.