Home / 15,715.45-21,681.13-8,997.45

Finding the Fourth Proportional to 15,715.45, 21,681.13 and 8,997.45

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Solution

The fourth proportional to 15,715.45, 21,681.13 and 8,997.45 is: 12,412.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.45 : 21,681.13 = 8,997.45 : x
  2. Step 2: Convert to fraction form
    15,715.45/21,681.13 = 8,997.45/x
  3. Step 3: Cross multiply
    15,715.45x = 21,681.13 × 8,997.45
  4. Step 4: Simplify right side
    15,715.45x = 195,074,883.12
  5. Step 5: Solve for x
    x = 195,074,883.12/15,715.45
  6. Step 6: Final answer
    x = 12,412.94

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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.