Home / 20,800.56-31,200.72-10,412.16

Finding the Fourth Proportional to 20,800.56, 31,200.72 and 10,412.16

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Solution

The fourth proportional to 20,800.56, 31,200.72 and 10,412.16 is: 15,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.56 : 31,200.72 = 10,412.16 : x
  2. Step 2: Convert to fraction form
    20,800.56/31,200.72 = 10,412.16/x
  3. Step 3: Cross multiply
    20,800.56x = 31,200.72 × 10,412.16
  4. Step 4: Simplify right side
    20,800.56x = 324,866,888.76
  5. Step 5: Solve for x
    x = 324,866,888.76/20,800.56
  6. Step 6: Final answer
    x = 15,618.18

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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.