Home / 20,585.10-28,407.47-11,153.66

Finding the Fourth Proportional to 20,585.10, 28,407.47 and 11,153.66

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Solution

The fourth proportional to 20,585.10, 28,407.47 and 11,153.66 is: 15,392.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.10 : 28,407.47 = 11,153.66 : x
  2. Step 2: Convert to fraction form
    20,585.10/28,407.47 = 11,153.66/x
  3. Step 3: Cross multiply
    20,585.10x = 28,407.47 × 11,153.66
  4. Step 4: Simplify right side
    20,585.10x = 316,847,064.03
  5. Step 5: Solve for x
    x = 316,847,064.03/20,585.10
  6. Step 6: Final answer
    x = 15,392.06

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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.