Home / 15,612.80-21,545.68-8,539.36

Finding the Fourth Proportional to 15,612.80, 21,545.68 and 8,539.36

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Solution

The fourth proportional to 15,612.80, 21,545.68 and 8,539.36 is: 11,784.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,612.80 : 21,545.68 = 8,539.36 : x
  2. Step 2: Convert to fraction form
    15,612.80/21,545.68 = 8,539.36/x
  3. Step 3: Cross multiply
    15,612.80x = 21,545.68 × 8,539.36
  4. Step 4: Simplify right side
    15,612.80x = 183,986,317.96
  5. Step 5: Solve for x
    x = 183,986,317.96/15,612.80
  6. Step 6: Final answer
    x = 11,784.33

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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.