Home / 20,689.87-28,554.98-11,616.19

Finding the Fourth Proportional to 20,689.87, 28,554.98 and 11,616.19

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Solution

The fourth proportional to 20,689.87, 28,554.98 and 11,616.19 is: 16,032.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.87 : 28,554.98 = 11,616.19 : x
  2. Step 2: Convert to fraction form
    20,689.87/28,554.98 = 11,616.19/x
  3. Step 3: Cross multiply
    20,689.87x = 28,554.98 × 11,616.19
  4. Step 4: Simplify right side
    20,689.87x = 331,700,073.13
  5. Step 5: Solve for x
    x = 331,700,073.13/20,689.87
  6. Step 6: Final answer
    x = 16,032.00

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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.