Home / 15,428.50-21,275.40-13,197.76

Finding the Fourth Proportional to 15,428.50, 21,275.40 and 13,197.76

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Solution

The fourth proportional to 15,428.50, 21,275.40 and 13,197.76 is: 18,199.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.50 : 21,275.40 = 13,197.76 : x
  2. Step 2: Convert to fraction form
    15,428.50/21,275.40 = 13,197.76/x
  3. Step 3: Cross multiply
    15,428.50x = 21,275.40 × 13,197.76
  4. Step 4: Simplify right side
    15,428.50x = 280,787,623.10
  5. Step 5: Solve for x
    x = 280,787,623.10/15,428.50
  6. Step 6: Final answer
    x = 18,199.28

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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.