Home / 21,263.91-29,331.29-13,299.59

Finding the Fourth Proportional to 21,263.91, 29,331.29 and 13,299.59

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Solution

The fourth proportional to 21,263.91, 29,331.29 and 13,299.59 is: 18,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,263.91 : 29,331.29 = 13,299.59 : x
  2. Step 2: Convert to fraction form
    21,263.91/29,331.29 = 13,299.59/x
  3. Step 3: Cross multiply
    21,263.91x = 29,331.29 × 13,299.59
  4. Step 4: Simplify right side
    21,263.91x = 390,093,918.02
  5. Step 5: Solve for x
    x = 390,093,918.02/21,263.91
  6. Step 6: Final answer
    x = 18,345.35

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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.