Home / 21,971.25-30,320.23-12,280.69

Finding the Fourth Proportional to 21,971.25, 30,320.23 and 12,280.69

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Solution

The fourth proportional to 21,971.25, 30,320.23 and 12,280.69 is: 16,947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.25 : 30,320.23 = 12,280.69 : x
  2. Step 2: Convert to fraction form
    21,971.25/30,320.23 = 12,280.69/x
  3. Step 3: Cross multiply
    21,971.25x = 30,320.23 × 12,280.69
  4. Step 4: Simplify right side
    21,971.25x = 372,353,295.71
  5. Step 5: Solve for x
    x = 372,353,295.71/21,971.25
  6. Step 6: Final answer
    x = 16,947.30

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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.