Home / 20,964.96-31,430.16-9,865.92

Finding the Fourth Proportional to 20,964.96, 31,430.16 and 9,865.92

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Solution

The fourth proportional to 20,964.96, 31,430.16 and 9,865.92 is: 14,790.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.96 : 31,430.16 = 9,865.92 : x
  2. Step 2: Convert to fraction form
    20,964.96/31,430.16 = 9,865.92/x
  3. Step 3: Cross multiply
    20,964.96x = 31,430.16 × 9,865.92
  4. Step 4: Simplify right side
    20,964.96x = 310,087,444.15
  5. Step 5: Solve for x
    x = 310,087,444.15/20,964.96
  6. Step 6: Final answer
    x = 14,790.75

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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.