Home / 28,239.12-42,373.12-12,455.12

Finding the Fourth Proportional to 28,239.12, 42,373.12 and 12,455.12

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Solution

The fourth proportional to 28,239.12, 42,373.12 and 12,455.12 is: 18,689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.12 : 42,373.12 = 12,455.12 : x
  2. Step 2: Convert to fraction form
    28,239.12/42,373.12 = 12,455.12/x
  3. Step 3: Cross multiply
    28,239.12x = 42,373.12 × 12,455.12
  4. Step 4: Simplify right side
    28,239.12x = 527,762,294.37
  5. Step 5: Solve for x
    x = 527,762,294.37/28,239.12
  6. Step 6: Final answer
    x = 18,689.05

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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.