Home / 20,750.90-31,126.63-6,518.91

Finding the Fourth Proportional to 20,750.90, 31,126.63 and 6,518.91

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Solution

The fourth proportional to 20,750.90, 31,126.63 and 6,518.91 is: 9,778.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.90 : 31,126.63 = 6,518.91 : x
  2. Step 2: Convert to fraction form
    20,750.90/31,126.63 = 6,518.91/x
  3. Step 3: Cross multiply
    20,750.90x = 31,126.63 × 6,518.91
  4. Step 4: Simplify right side
    20,750.90x = 202,911,816.30
  5. Step 5: Solve for x
    x = 202,911,816.30/20,750.90
  6. Step 6: Final answer
    x = 9,778.46

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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.