Home / 15,545.59-21,457.10-8,831.50

Finding the Fourth Proportional to 15,545.59, 21,457.10 and 8,831.50

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Solution

The fourth proportional to 15,545.59, 21,457.10 and 8,831.50 is: 12,189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,545.59 : 21,457.10 = 8,831.50 : x
  2. Step 2: Convert to fraction form
    15,545.59/21,457.10 = 8,831.50/x
  3. Step 3: Cross multiply
    15,545.59x = 21,457.10 × 8,831.50
  4. Step 4: Simplify right side
    15,545.59x = 189,498,347.09
  5. Step 5: Solve for x
    x = 189,498,347.09/15,545.59
  6. Step 6: Final answer
    x = 12,189.85

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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.