Home / 20,471.13-28,258.47-13,303.44

Finding the Fourth Proportional to 20,471.13, 28,258.47 and 13,303.44

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Solution

The fourth proportional to 20,471.13, 28,258.47 and 13,303.44 is: 18,364.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.13 : 28,258.47 = 13,303.44 : x
  2. Step 2: Convert to fraction form
    20,471.13/28,258.47 = 13,303.44/x
  3. Step 3: Cross multiply
    20,471.13x = 28,258.47 × 13,303.44
  4. Step 4: Simplify right side
    20,471.13x = 375,934,860.14
  5. Step 5: Solve for x
    x = 375,934,860.14/20,471.13
  6. Step 6: Final answer
    x = 18,364.15

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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.