Home / 20,980.24-31,470.60-7,130.32

Finding the Fourth Proportional to 20,980.24, 31,470.60 and 7,130.32

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Solution

The fourth proportional to 20,980.24, 31,470.60 and 7,130.32 is: 10,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.24 : 31,470.60 = 7,130.32 : x
  2. Step 2: Convert to fraction form
    20,980.24/31,470.60 = 7,130.32/x
  3. Step 3: Cross multiply
    20,980.24x = 31,470.60 × 7,130.32
  4. Step 4: Simplify right side
    20,980.24x = 224,395,448.59
  5. Step 5: Solve for x
    x = 224,395,448.59/20,980.24
  6. Step 6: Final answer
    x = 10,695.56

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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.