Home / 20,659.40-31,065.90-17,280.20

Finding the Fourth Proportional to 20,659.40, 31,065.90 and 17,280.20

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Solution

The fourth proportional to 20,659.40, 31,065.90 and 17,280.20 is: 25,984.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.40 : 31,065.90 = 17,280.20 : x
  2. Step 2: Convert to fraction form
    20,659.40/31,065.90 = 17,280.20/x
  3. Step 3: Cross multiply
    20,659.40x = 31,065.90 × 17,280.20
  4. Step 4: Simplify right side
    20,659.40x = 536,824,965.18
  5. Step 5: Solve for x
    x = 536,824,965.18/20,659.40
  6. Step 6: Final answer
    x = 25,984.54

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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.