Home / 20,710.20-31,089.60-20,564.40

Finding the Fourth Proportional to 20,710.20, 31,089.60 and 20,564.40

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Solution

The fourth proportional to 20,710.20, 31,089.60 and 20,564.40 is: 30,870.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.20 : 31,089.60 = 20,564.40 : x
  2. Step 2: Convert to fraction form
    20,710.20/31,089.60 = 20,564.40/x
  3. Step 3: Cross multiply
    20,710.20x = 31,089.60 × 20,564.40
  4. Step 4: Simplify right side
    20,710.20x = 639,338,970.24
  5. Step 5: Solve for x
    x = 639,338,970.24/20,710.20
  6. Step 6: Final answer
    x = 30,870.73

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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.