Home / 21,193.12-31,801.20-8,889.76

Finding the Fourth Proportional to 21,193.12, 31,801.20 and 8,889.76

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Solution

The fourth proportional to 21,193.12, 31,801.20 and 8,889.76 is: 13,339.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,193.12 : 31,801.20 = 8,889.76 : x
  2. Step 2: Convert to fraction form
    21,193.12/31,801.20 = 8,889.76/x
  3. Step 3: Cross multiply
    21,193.12x = 31,801.20 × 8,889.76
  4. Step 4: Simplify right side
    21,193.12x = 282,705,035.71
  5. Step 5: Solve for x
    x = 282,705,035.71/21,193.12
  6. Step 6: Final answer
    x = 13,339.47

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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.