Home / 21,023.21-29,014.08-15,708.80

Finding the Fourth Proportional to 21,023.21, 29,014.08 and 15,708.80

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Solution

The fourth proportional to 21,023.21, 29,014.08 and 15,708.80 is: 21,679.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.21 : 29,014.08 = 15,708.80 : x
  2. Step 2: Convert to fraction form
    21,023.21/29,014.08 = 15,708.80/x
  3. Step 3: Cross multiply
    21,023.21x = 29,014.08 × 15,708.80
  4. Step 4: Simplify right side
    21,023.21x = 455,776,379.90
  5. Step 5: Solve for x
    x = 455,776,379.90/21,023.21
  6. Step 6: Final answer
    x = 21,679.68

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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.