Home / 20,472.36-28,253.22-15,427.68

Finding the Fourth Proportional to 20,472.36, 28,253.22 and 15,427.68

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Solution

The fourth proportional to 20,472.36, 28,253.22 and 15,427.68 is: 21,291.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.36 : 28,253.22 = 15,427.68 : x
  2. Step 2: Convert to fraction form
    20,472.36/28,253.22 = 15,427.68/x
  3. Step 3: Cross multiply
    20,472.36x = 28,253.22 × 15,427.68
  4. Step 4: Simplify right side
    20,472.36x = 435,881,637.13
  5. Step 5: Solve for x
    x = 435,881,637.13/20,472.36
  6. Step 6: Final answer
    x = 21,291.23

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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.