Home / 21,307.32-31,959.84-8,158.68

Finding the Fourth Proportional to 21,307.32, 31,959.84 and 8,158.68

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Solution

The fourth proportional to 21,307.32, 31,959.84 and 8,158.68 is: 12,237.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.32 : 31,959.84 = 8,158.68 : x
  2. Step 2: Convert to fraction form
    21,307.32/31,959.84 = 8,158.68/x
  3. Step 3: Cross multiply
    21,307.32x = 31,959.84 × 8,158.68
  4. Step 4: Simplify right side
    21,307.32x = 260,750,107.41
  5. Step 5: Solve for x
    x = 260,750,107.41/21,307.32
  6. Step 6: Final answer
    x = 12,237.58

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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.