Home / 15,854.35-21,881.33-9,138.66

Finding the Fourth Proportional to 15,854.35, 21,881.33 and 9,138.66

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Solution

The fourth proportional to 15,854.35, 21,881.33 and 9,138.66 is: 12,612.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.35 : 21,881.33 = 9,138.66 : x
  2. Step 2: Convert to fraction form
    15,854.35/21,881.33 = 9,138.66/x
  3. Step 3: Cross multiply
    15,854.35x = 21,881.33 × 9,138.66
  4. Step 4: Simplify right side
    15,854.35x = 199,966,035.22
  5. Step 5: Solve for x
    x = 199,966,035.22/15,854.35
  6. Step 6: Final answer
    x = 12,612.70

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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.