Home / 20,762.10-31,139.55-7,607.70

Finding the Fourth Proportional to 20,762.10, 31,139.55 and 7,607.70

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Solution

The fourth proportional to 20,762.10, 31,139.55 and 7,607.70 is: 11,410.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.10 : 31,139.55 = 7,607.70 : x
  2. Step 2: Convert to fraction form
    20,762.10/31,139.55 = 7,607.70/x
  3. Step 3: Cross multiply
    20,762.10x = 31,139.55 × 7,607.70
  4. Step 4: Simplify right side
    20,762.10x = 236,900,354.54
  5. Step 5: Solve for x
    x = 236,900,354.54/20,762.10
  6. Step 6: Final answer
    x = 11,410.23

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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.