Home / 21,656.90-29,913.18-15,679.10

Finding the Fourth Proportional to 21,656.90, 29,913.18 and 15,679.10

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Solution

The fourth proportional to 21,656.90, 29,913.18 and 15,679.10 is: 21,656.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.90 : 29,913.18 = 15,679.10 : x
  2. Step 2: Convert to fraction form
    21,656.90/29,913.18 = 15,679.10/x
  3. Step 3: Cross multiply
    21,656.90x = 29,913.18 × 15,679.10
  4. Step 4: Simplify right side
    21,656.90x = 469,011,740.54
  5. Step 5: Solve for x
    x = 469,011,740.54/21,656.90
  6. Step 6: Final answer
    x = 21,656.46

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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.