Home / 21,319.67-31,983.45-7,278.93

Finding the Fourth Proportional to 21,319.67, 31,983.45 and 7,278.93

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Solution

The fourth proportional to 21,319.67, 31,983.45 and 7,278.93 is: 10,919.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.67 : 31,983.45 = 7,278.93 : x
  2. Step 2: Convert to fraction form
    21,319.67/31,983.45 = 7,278.93/x
  3. Step 3: Cross multiply
    21,319.67x = 31,983.45 × 7,278.93
  4. Step 4: Simplify right side
    21,319.67x = 232,805,293.71
  5. Step 5: Solve for x
    x = 232,805,293.71/21,319.67
  6. Step 6: Final answer
    x = 10,919.74

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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.