Home / 13,445.64-20,168.40-5,123.76

Finding the Fourth Proportional to 13,445.64, 20,168.40 and 5,123.76

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Solution

The fourth proportional to 13,445.64, 20,168.40 and 5,123.76 is: 7,685.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.64 : 20,168.40 = 5,123.76 : x
  2. Step 2: Convert to fraction form
    13,445.64/20,168.40 = 5,123.76/x
  3. Step 3: Cross multiply
    13,445.64x = 20,168.40 × 5,123.76
  4. Step 4: Simplify right side
    13,445.64x = 103,338,041.18
  5. Step 5: Solve for x
    x = 103,338,041.18/13,445.64
  6. Step 6: Final answer
    x = 7,685.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.