Home / 13,551.50-18,700.07-7,886.30

Finding the Fourth Proportional to 13,551.50, 18,700.07 and 7,886.30

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Solution

The fourth proportional to 13,551.50, 18,700.07 and 7,886.30 is: 10,882.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,551.50 : 18,700.07 = 7,886.30 : x
  2. Step 2: Convert to fraction form
    13,551.50/18,700.07 = 7,886.30/x
  3. Step 3: Cross multiply
    13,551.50x = 18,700.07 × 7,886.30
  4. Step 4: Simplify right side
    13,551.50x = 147,474,229.11
  5. Step 5: Solve for x
    x = 147,474,229.11/13,551.50
  6. Step 6: Final answer
    x = 10,882.50

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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.