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Finding the Fourth Proportional to 21,920.76, 32,886.06 and 6,339.60

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Solution

The fourth proportional to 21,920.76, 32,886.06 and 6,339.60 is: 9,510.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.76 : 32,886.06 = 6,339.60 : x
  2. Step 2: Convert to fraction form
    21,920.76/32,886.06 = 6,339.60/x
  3. Step 3: Cross multiply
    21,920.76x = 32,886.06 × 6,339.60
  4. Step 4: Simplify right side
    21,920.76x = 208,484,465.98
  5. Step 5: Solve for x
    x = 208,484,465.98/21,920.76
  6. Step 6: Final answer
    x = 9,510.82

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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.