Home / 21,347.80-29,478.92-13,295.28

Finding the Fourth Proportional to 21,347.80, 29,478.92 and 13,295.28

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Solution

The fourth proportional to 21,347.80, 29,478.92 and 13,295.28 is: 18,359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.80 : 29,478.92 = 13,295.28 : x
  2. Step 2: Convert to fraction form
    21,347.80/29,478.92 = 13,295.28/x
  3. Step 3: Cross multiply
    21,347.80x = 29,478.92 × 13,295.28
  4. Step 4: Simplify right side
    21,347.80x = 391,930,495.50
  5. Step 5: Solve for x
    x = 391,930,495.50/21,347.80
  6. Step 6: Final answer
    x = 18,359.29

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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.