Home / 21,428.26-29,572.64-12,355.10

Finding the Fourth Proportional to 21,428.26, 29,572.64 and 12,355.10

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Solution

The fourth proportional to 21,428.26, 29,572.64 and 12,355.10 is: 17,050.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.26 : 29,572.64 = 12,355.10 : x
  2. Step 2: Convert to fraction form
    21,428.26/29,572.64 = 12,355.10/x
  3. Step 3: Cross multiply
    21,428.26x = 29,572.64 × 12,355.10
  4. Step 4: Simplify right side
    21,428.26x = 365,372,924.46
  5. Step 5: Solve for x
    x = 365,372,924.46/21,428.26
  6. Step 6: Final answer
    x = 17,050.98

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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.