Home / 21,510.56-29,684.60-12,079.20

Finding the Fourth Proportional to 21,510.56, 29,684.60 and 12,079.20

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Solution

The fourth proportional to 21,510.56, 29,684.60 and 12,079.20 is: 16,669.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.56 : 29,684.60 = 12,079.20 : x
  2. Step 2: Convert to fraction form
    21,510.56/29,684.60 = 12,079.20/x
  3. Step 3: Cross multiply
    21,510.56x = 29,684.60 × 12,079.20
  4. Step 4: Simplify right side
    21,510.56x = 358,566,220.32
  5. Step 5: Solve for x
    x = 358,566,220.32/21,510.56
  6. Step 6: Final answer
    x = 16,669.31

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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.