Home / 21,034.64-29,029.84-15,720.16

Finding the Fourth Proportional to 21,034.64, 29,029.84 and 15,720.16

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Solution

The fourth proportional to 21,034.64, 29,029.84 and 15,720.16 is: 21,695.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,034.64 : 29,029.84 = 15,720.16 : x
  2. Step 2: Convert to fraction form
    21,034.64/29,029.84 = 15,720.16/x
  3. Step 3: Cross multiply
    21,034.64x = 29,029.84 × 15,720.16
  4. Step 4: Simplify right side
    21,034.64x = 456,353,729.57
  5. Step 5: Solve for x
    x = 456,353,729.57/21,034.64
  6. Step 6: Final answer
    x = 21,695.34

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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.