Home / 20,262.71-30,403.16-12,865.19

Finding the Fourth Proportional to 20,262.71, 30,403.16 and 12,865.19

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Solution

The fourth proportional to 20,262.71, 30,403.16 and 12,865.19 is: 19,303.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,262.71 : 30,403.16 = 12,865.19 : x
  2. Step 2: Convert to fraction form
    20,262.71/30,403.16 = 12,865.19/x
  3. Step 3: Cross multiply
    20,262.71x = 30,403.16 × 12,865.19
  4. Step 4: Simplify right side
    20,262.71x = 391,142,430.00
  5. Step 5: Solve for x
    x = 391,142,430.00/20,262.71
  6. Step 6: Final answer
    x = 19,303.56

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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.