Home / 15,445.38-21,298.71-13,214.64

Finding the Fourth Proportional to 15,445.38, 21,298.71 and 13,214.64

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Solution

The fourth proportional to 15,445.38, 21,298.71 and 13,214.64 is: 18,222.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.38 : 21,298.71 = 13,214.64 : x
  2. Step 2: Convert to fraction form
    15,445.38/21,298.71 = 13,214.64/x
  3. Step 3: Cross multiply
    15,445.38x = 21,298.71 × 13,214.64
  4. Step 4: Simplify right side
    15,445.38x = 281,454,785.11
  5. Step 5: Solve for x
    x = 281,454,785.11/15,445.38
  6. Step 6: Final answer
    x = 18,222.59

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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.