Home / 21,843.18-30,140.54-12,281.74

Finding the Fourth Proportional to 21,843.18, 30,140.54 and 12,281.74

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Solution

The fourth proportional to 21,843.18, 30,140.54 and 12,281.74 is: 16,947.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.18 : 30,140.54 = 12,281.74 : x
  2. Step 2: Convert to fraction form
    21,843.18/30,140.54 = 12,281.74/x
  3. Step 3: Cross multiply
    21,843.18x = 30,140.54 × 12,281.74
  4. Step 4: Simplify right side
    21,843.18x = 370,178,275.74
  5. Step 5: Solve for x
    x = 370,178,275.74/21,843.18
  6. Step 6: Final answer
    x = 16,947.09

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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.