Home / 21,421.40-32,132.10-18,140.90

Finding the Fourth Proportional to 21,421.40, 32,132.10 and 18,140.90

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Solution

The fourth proportional to 21,421.40, 32,132.10 and 18,140.90 is: 27,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.40 : 32,132.10 = 18,140.90 : x
  2. Step 2: Convert to fraction form
    21,421.40/32,132.10 = 18,140.90/x
  3. Step 3: Cross multiply
    21,421.40x = 32,132.10 × 18,140.90
  4. Step 4: Simplify right side
    21,421.40x = 582,905,212.89
  5. Step 5: Solve for x
    x = 582,905,212.89/21,421.40
  6. Step 6: Final answer
    x = 27,211.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.