Home / 20,618.47-28,454.04-11,187.03

Finding the Fourth Proportional to 20,618.47, 28,454.04 and 11,187.03

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Solution

The fourth proportional to 20,618.47, 28,454.04 and 11,187.03 is: 15,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.47 : 28,454.04 = 11,187.03 : x
  2. Step 2: Convert to fraction form
    20,618.47/28,454.04 = 11,187.03/x
  3. Step 3: Cross multiply
    20,618.47x = 28,454.04 × 11,187.03
  4. Step 4: Simplify right side
    20,618.47x = 318,316,199.10
  5. Step 5: Solve for x
    x = 318,316,199.10/20,618.47
  6. Step 6: Final answer
    x = 15,438.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.