Home / 13,999.28-19,319.04-7,711.76

Finding the Fourth Proportional to 13,999.28, 19,319.04 and 7,711.76

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Solution

The fourth proportional to 13,999.28, 19,319.04 and 7,711.76 is: 10,642.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.28 : 19,319.04 = 7,711.76 : x
  2. Step 2: Convert to fraction form
    13,999.28/19,319.04 = 7,711.76/x
  3. Step 3: Cross multiply
    13,999.28x = 19,319.04 × 7,711.76
  4. Step 4: Simplify right side
    13,999.28x = 148,983,799.91
  5. Step 5: Solve for x
    x = 148,983,799.91/13,999.28
  6. Step 6: Final answer
    x = 10,642.25

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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.