Home / 13,921.68-19,211.88-7,955.20

Finding the Fourth Proportional to 13,921.68, 19,211.88 and 7,955.20

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Solution

The fourth proportional to 13,921.68, 19,211.88 and 7,955.20 is: 10,978.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.68 : 19,211.88 = 7,955.20 : x
  2. Step 2: Convert to fraction form
    13,921.68/19,211.88 = 7,955.20/x
  3. Step 3: Cross multiply
    13,921.68x = 19,211.88 × 7,955.20
  4. Step 4: Simplify right side
    13,921.68x = 152,834,347.78
  5. Step 5: Solve for x
    x = 152,834,347.78/13,921.68
  6. Step 6: Final answer
    x = 10,978.15

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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.