Home / 20,987.52-31,500.48-13,210.24

Finding the Fourth Proportional to 20,987.52, 31,500.48 and 13,210.24

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Solution

The fourth proportional to 20,987.52, 31,500.48 and 13,210.24 is: 19,827.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.52 : 31,500.48 = 13,210.24 : x
  2. Step 2: Convert to fraction form
    20,987.52/31,500.48 = 13,210.24/x
  3. Step 3: Cross multiply
    20,987.52x = 31,500.48 × 13,210.24
  4. Step 4: Simplify right side
    20,987.52x = 416,128,900.92
  5. Step 5: Solve for x
    x = 416,128,900.92/20,987.52
  6. Step 6: Final answer
    x = 19,827.45

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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.