Home / 13,553.59-18,705.10-7,888.87

Finding the Fourth Proportional to 13,553.59, 18,705.10 and 7,888.87

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Solution

The fourth proportional to 13,553.59, 18,705.10 and 7,888.87 is: 10,887.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,553.59 : 18,705.10 = 7,888.87 : x
  2. Step 2: Convert to fraction form
    13,553.59/18,705.10 = 7,888.87/x
  3. Step 3: Cross multiply
    13,553.59x = 18,705.10 × 7,888.87
  4. Step 4: Simplify right side
    13,553.59x = 147,561,997.92
  5. Step 5: Solve for x
    x = 147,561,997.92/13,553.59
  6. Step 6: Final answer
    x = 10,887.30

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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.