Home / 21,045.18-31,545.81-8,560.20

Finding the Fourth Proportional to 21,045.18, 31,545.81 and 8,560.20

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Solution

The fourth proportional to 21,045.18, 31,545.81 and 8,560.20 is: 12,831.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.18 : 31,545.81 = 8,560.20 : x
  2. Step 2: Convert to fraction form
    21,045.18/31,545.81 = 8,560.20/x
  3. Step 3: Cross multiply
    21,045.18x = 31,545.81 × 8,560.20
  4. Step 4: Simplify right side
    21,045.18x = 270,038,442.76
  5. Step 5: Solve for x
    x = 270,038,442.76/21,045.18
  6. Step 6: Final answer
    x = 12,831.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.