Home / 21,253.81-29,330.41-13,300.55

Finding the Fourth Proportional to 21,253.81, 29,330.41 and 13,300.55

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Solution

The fourth proportional to 21,253.81, 29,330.41 and 13,300.55 is: 18,354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.81 : 29,330.41 = 13,300.55 : x
  2. Step 2: Convert to fraction form
    21,253.81/29,330.41 = 13,300.55/x
  3. Step 3: Cross multiply
    21,253.81x = 29,330.41 × 13,300.55
  4. Step 4: Simplify right side
    21,253.81x = 390,110,584.73
  5. Step 5: Solve for x
    x = 390,110,584.73/21,253.81
  6. Step 6: Final answer
    x = 18,354.85

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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.