Home / 28,065.32-38,729.55-15,318.08

Finding the Fourth Proportional to 28,065.32, 38,729.55 and 15,318.08

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Solution

The fourth proportional to 28,065.32, 38,729.55 and 15,318.08 is: 21,138.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.32 : 38,729.55 = 15,318.08 : x
  2. Step 2: Convert to fraction form
    28,065.32/38,729.55 = 15,318.08/x
  3. Step 3: Cross multiply
    28,065.32x = 38,729.55 × 15,318.08
  4. Step 4: Simplify right side
    28,065.32x = 593,262,345.26
  5. Step 5: Solve for x
    x = 593,262,345.26/28,065.32
  6. Step 6: Final answer
    x = 21,138.63

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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.