Home / 15,312.70-21,129.89-8,599.06

Finding the Fourth Proportional to 15,312.70, 21,129.89 and 8,599.06

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Solution

The fourth proportional to 15,312.70, 21,129.89 and 8,599.06 is: 11,865.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.70 : 21,129.89 = 8,599.06 : x
  2. Step 2: Convert to fraction form
    15,312.70/21,129.89 = 8,599.06/x
  3. Step 3: Cross multiply
    15,312.70x = 21,129.89 × 8,599.06
  4. Step 4: Simplify right side
    15,312.70x = 181,697,191.90
  5. Step 5: Solve for x
    x = 181,697,191.90/15,312.70
  6. Step 6: Final answer
    x = 11,865.78

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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.