Home / 20,975.12-31,474.80-10,587.68

Finding the Fourth Proportional to 20,975.12, 31,474.80 and 10,587.68

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Solution

The fourth proportional to 20,975.12, 31,474.80 and 10,587.68 is: 15,887.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.12 : 31,474.80 = 10,587.68 : x
  2. Step 2: Convert to fraction form
    20,975.12/31,474.80 = 10,587.68/x
  3. Step 3: Cross multiply
    20,975.12x = 31,474.80 × 10,587.68
  4. Step 4: Simplify right side
    20,975.12x = 333,245,110.46
  5. Step 5: Solve for x
    x = 333,245,110.46/20,975.12
  6. Step 6: Final answer
    x = 15,887.64

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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.