Home / 21,709.40-32,564.10-20,397.20

Finding the Fourth Proportional to 21,709.40, 32,564.10 and 20,397.20

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Solution

The fourth proportional to 21,709.40, 32,564.10 and 20,397.20 is: 30,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.40 : 32,564.10 = 20,397.20 : x
  2. Step 2: Convert to fraction form
    21,709.40/32,564.10 = 20,397.20/x
  3. Step 3: Cross multiply
    21,709.40x = 32,564.10 × 20,397.20
  4. Step 4: Simplify right side
    21,709.40x = 664,216,460.52
  5. Step 5: Solve for x
    x = 664,216,460.52/21,709.40
  6. Step 6: Final answer
    x = 30,595.80

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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.