Home / 21,225.60-29,283.36-13,155.58

Finding the Fourth Proportional to 21,225.60, 29,283.36 and 13,155.58

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Solution

The fourth proportional to 21,225.60, 29,283.36 and 13,155.58 is: 18,149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.60 : 29,283.36 = 13,155.58 : x
  2. Step 2: Convert to fraction form
    21,225.60/29,283.36 = 13,155.58/x
  3. Step 3: Cross multiply
    21,225.60x = 29,283.36 × 13,155.58
  4. Step 4: Simplify right side
    21,225.60x = 385,239,585.15
  5. Step 5: Solve for x
    x = 385,239,585.15/21,225.60
  6. Step 6: Final answer
    x = 18,149.76

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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.