Home / 21,854.55-30,158.77-13,356.64

Finding the Fourth Proportional to 21,854.55, 30,158.77 and 13,356.64

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Solution

The fourth proportional to 21,854.55, 30,158.77 and 13,356.64 is: 18,431.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854.55 : 30,158.77 = 13,356.64 : x
  2. Step 2: Convert to fraction form
    21,854.55/30,158.77 = 13,356.64/x
  3. Step 3: Cross multiply
    21,854.55x = 30,158.77 × 13,356.64
  4. Step 4: Simplify right side
    21,854.55x = 402,819,833.73
  5. Step 5: Solve for x
    x = 402,819,833.73/21,854.55
  6. Step 6: Final answer
    x = 18,431.85

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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.