Home / 20,585.16-28,407.62-11,153.72

Finding the Fourth Proportional to 20,585.16, 28,407.62 and 11,153.72

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Solution

The fourth proportional to 20,585.16, 28,407.62 and 11,153.72 is: 15,392.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.16 : 28,407.62 = 11,153.72 : x
  2. Step 2: Convert to fraction form
    20,585.16/28,407.62 = 11,153.72/x
  3. Step 3: Cross multiply
    20,585.16x = 28,407.62 × 11,153.72
  4. Step 4: Simplify right side
    20,585.16x = 316,850,639.35
  5. Step 5: Solve for x
    x = 316,850,639.35/20,585.16
  6. Step 6: Final answer
    x = 15,392.19

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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.