Home / 21,384.45-29,510.73-12,432.20

Finding the Fourth Proportional to 21,384.45, 29,510.73 and 12,432.20

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Solution

The fourth proportional to 21,384.45, 29,510.73 and 12,432.20 is: 17,156.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,384.45 : 29,510.73 = 12,432.20 : x
  2. Step 2: Convert to fraction form
    21,384.45/29,510.73 = 12,432.20/x
  3. Step 3: Cross multiply
    21,384.45x = 29,510.73 × 12,432.20
  4. Step 4: Simplify right side
    21,384.45x = 366,883,149.95
  5. Step 5: Solve for x
    x = 366,883,149.95/21,384.45
  6. Step 6: Final answer
    x = 17,156.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.