Home / 21,280.62-31,919.73-9,430.98

Finding the Fourth Proportional to 21,280.62, 31,919.73 and 9,430.98

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Solution

The fourth proportional to 21,280.62, 31,919.73 and 9,430.98 is: 14,145.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.62 : 31,919.73 = 9,430.98 : x
  2. Step 2: Convert to fraction form
    21,280.62/31,919.73 = 9,430.98/x
  3. Step 3: Cross multiply
    21,280.62x = 31,919.73 × 9,430.98
  4. Step 4: Simplify right side
    21,280.62x = 301,034,335.24
  5. Step 5: Solve for x
    x = 301,034,335.24/21,280.62
  6. Step 6: Final answer
    x = 14,145.94

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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.