Home / 21,686.40-32,529.60-20,374.20

Finding the Fourth Proportional to 21,686.40, 32,529.60 and 20,374.20

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Solution

The fourth proportional to 21,686.40, 32,529.60 and 20,374.20 is: 30,561.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.40 : 32,529.60 = 20,374.20 : x
  2. Step 2: Convert to fraction form
    21,686.40/32,529.60 = 20,374.20/x
  3. Step 3: Cross multiply
    21,686.40x = 32,529.60 × 20,374.20
  4. Step 4: Simplify right side
    21,686.40x = 662,764,576.32
  5. Step 5: Solve for x
    x = 662,764,576.32/21,686.40
  6. Step 6: Final answer
    x = 30,561.30

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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.