Home / 21,122.25-29,152.28-12,174.95

Finding the Fourth Proportional to 21,122.25, 29,152.28 and 12,174.95

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Solution

The fourth proportional to 21,122.25, 29,152.28 and 12,174.95 is: 16,803.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.25 : 29,152.28 = 12,174.95 : x
  2. Step 2: Convert to fraction form
    21,122.25/29,152.28 = 12,174.95/x
  3. Step 3: Cross multiply
    21,122.25x = 29,152.28 × 12,174.95
  4. Step 4: Simplify right side
    21,122.25x = 354,927,661.46
  5. Step 5: Solve for x
    x = 354,927,661.46/21,122.25
  6. Step 6: Final answer
    x = 16,803.50

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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.