Home / 15,585.18-21,531.08-10,220.42

Finding the Fourth Proportional to 15,585.18, 21,531.08 and 10,220.42

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Solution

The fourth proportional to 15,585.18, 21,531.08 and 10,220.42 is: 14,119.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.18 : 21,531.08 = 10,220.42 : x
  2. Step 2: Convert to fraction form
    15,585.18/21,531.08 = 10,220.42/x
  3. Step 3: Cross multiply
    15,585.18x = 21,531.08 × 10,220.42
  4. Step 4: Simplify right side
    15,585.18x = 220,056,680.65
  5. Step 5: Solve for x
    x = 220,056,680.65/15,585.18
  6. Step 6: Final answer
    x = 14,119.61

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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.