Home / 15,718.01-21,685.55-8,911.29

Finding the Fourth Proportional to 15,718.01, 21,685.55 and 8,911.29

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Solution

The fourth proportional to 15,718.01, 21,685.55 and 8,911.29 is: 12,294.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.01 : 21,685.55 = 8,911.29 : x
  2. Step 2: Convert to fraction form
    15,718.01/21,685.55 = 8,911.29/x
  3. Step 3: Cross multiply
    15,718.01x = 21,685.55 × 8,911.29
  4. Step 4: Simplify right side
    15,718.01x = 193,246,225.70
  5. Step 5: Solve for x
    x = 193,246,225.70/15,718.01
  6. Step 6: Final answer
    x = 12,294.58

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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.