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Finding the Fourth Proportional to 21,862.85, 32,810.20 and 8,718.98

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Solution

The fourth proportional to 21,862.85, 32,810.20 and 8,718.98 is: 13,084.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.85 : 32,810.20 = 8,718.98 : x
  2. Step 2: Convert to fraction form
    21,862.85/32,810.20 = 8,718.98/x
  3. Step 3: Cross multiply
    21,862.85x = 32,810.20 × 8,718.98
  4. Step 4: Simplify right side
    21,862.85x = 286,071,291.75
  5. Step 5: Solve for x
    x = 286,071,291.75/21,862.85
  6. Step 6: Final answer
    x = 13,084.82

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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.