Home / 15,312.45-21,129.89-8,597.55

Finding the Fourth Proportional to 15,312.45, 21,129.89 and 8,597.55

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Solution

The fourth proportional to 15,312.45, 21,129.89 and 8,597.55 is: 11,863.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.45 : 21,129.89 = 8,597.55 : x
  2. Step 2: Convert to fraction form
    15,312.45/21,129.89 = 8,597.55/x
  3. Step 3: Cross multiply
    15,312.45x = 21,129.89 × 8,597.55
  4. Step 4: Simplify right side
    15,312.45x = 181,665,242.78
  5. Step 5: Solve for x
    x = 181,665,242.78/15,312.45
  6. Step 6: Final answer
    x = 11,863.89

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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.