Home / 21,030.50-31,545.75-8,557.31

Finding the Fourth Proportional to 21,030.50, 31,545.75 and 8,557.31

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Solution

The fourth proportional to 21,030.50, 31,545.75 and 8,557.31 is: 12,835.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.50 : 31,545.75 = 8,557.31 : x
  2. Step 2: Convert to fraction form
    21,030.50/31,545.75 = 8,557.31/x
  3. Step 3: Cross multiply
    21,030.50x = 31,545.75 × 8,557.31
  4. Step 4: Simplify right side
    21,030.50x = 269,946,761.93
  5. Step 5: Solve for x
    x = 269,946,761.93/21,030.50
  6. Step 6: Final answer
    x = 12,835.97

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Double scale
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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.