Home / 20,585.47-28,407.95-11,154.03

Finding the Fourth Proportional to 20,585.47, 28,407.95 and 11,154.03

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Solution

The fourth proportional to 20,585.47, 28,407.95 and 11,154.03 is: 15,392.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.47 : 28,407.95 = 11,154.03 : x
  2. Step 2: Convert to fraction form
    20,585.47/28,407.95 = 11,154.03/x
  3. Step 3: Cross multiply
    20,585.47x = 28,407.95 × 11,154.03
  4. Step 4: Simplify right side
    20,585.47x = 316,863,126.54
  5. Step 5: Solve for x
    x = 316,863,126.54/20,585.47
  6. Step 6: Final answer
    x = 15,392.56

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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.