Home / 15,715.10-21,686.28-8,641.48

Finding the Fourth Proportional to 15,715.10, 21,686.28 and 8,641.48

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Solution

The fourth proportional to 15,715.10, 21,686.28 and 8,641.48 is: 11,924.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.10 : 21,686.28 = 8,641.48 : x
  2. Step 2: Convert to fraction form
    15,715.10/21,686.28 = 8,641.48/x
  3. Step 3: Cross multiply
    15,715.10x = 21,686.28 × 8,641.48
  4. Step 4: Simplify right side
    15,715.10x = 187,401,554.89
  5. Step 5: Solve for x
    x = 187,401,554.89/15,715.10
  6. Step 6: Final answer
    x = 11,924.94

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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.