Home / 28,685.34-42,989.13-13,864.77

Finding the Fourth Proportional to 28,685.34, 42,989.13 and 13,864.77

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Solution

The fourth proportional to 28,685.34, 42,989.13 and 13,864.77 is: 20,778.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.34 : 42,989.13 = 13,864.77 : x
  2. Step 2: Convert to fraction form
    28,685.34/42,989.13 = 13,864.77/x
  3. Step 3: Cross multiply
    28,685.34x = 42,989.13 × 13,864.77
  4. Step 4: Simplify right side
    28,685.34x = 596,034,399.95
  5. Step 5: Solve for x
    x = 596,034,399.95/28,685.34
  6. Step 6: Final answer
    x = 20,778.36

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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.