Home / 15,723.12-21,701.20-9,009.84

Finding the Fourth Proportional to 15,723.12, 21,701.20 and 9,009.84

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Solution

The fourth proportional to 15,723.12, 21,701.20 and 9,009.84 is: 12,435.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,723.12 : 21,701.20 = 9,009.84 : x
  2. Step 2: Convert to fraction form
    15,723.12/21,701.20 = 9,009.84/x
  3. Step 3: Cross multiply
    15,723.12x = 21,701.20 × 9,009.84
  4. Step 4: Simplify right side
    15,723.12x = 195,524,339.81
  5. Step 5: Solve for x
    x = 195,524,339.81/15,723.12
  6. Step 6: Final answer
    x = 12,435.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.