Home / 21,124.90-31,686.12-7,084.36

Finding the Fourth Proportional to 21,124.90, 31,686.12 and 7,084.36

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Solution

The fourth proportional to 21,124.90, 31,686.12 and 7,084.36 is: 10,626.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.90 : 31,686.12 = 7,084.36 : x
  2. Step 2: Convert to fraction form
    21,124.90/31,686.12 = 7,084.36/x
  3. Step 3: Cross multiply
    21,124.90x = 31,686.12 × 7,084.36
  4. Step 4: Simplify right side
    21,124.90x = 224,475,881.08
  5. Step 5: Solve for x
    x = 224,475,881.08/21,124.90
  6. Step 6: Final answer
    x = 10,626.13

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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.