Home / 15,715.08-21,680.61-8,997.08

Finding the Fourth Proportional to 15,715.08, 21,680.61 and 8,997.08

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Solution

The fourth proportional to 15,715.08, 21,680.61 and 8,997.08 is: 12,412.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.08 : 21,680.61 = 8,997.08 : x
  2. Step 2: Convert to fraction form
    15,715.08/21,680.61 = 8,997.08/x
  3. Step 3: Cross multiply
    15,715.08x = 21,680.61 × 8,997.08
  4. Step 4: Simplify right side
    15,715.08x = 195,062,074.22
  5. Step 5: Solve for x
    x = 195,062,074.22/15,715.08
  6. Step 6: Final answer
    x = 12,412.41

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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.