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Finding the Fourth Proportional to 12,920.74, 19,339.18 and 8,482.34

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Solution

The fourth proportional to 12,920.74, 19,339.18 and 8,482.34 is: 12,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.74 : 19,339.18 = 8,482.34 : x
  2. Step 2: Convert to fraction form
    12,920.74/19,339.18 = 8,482.34/x
  3. Step 3: Cross multiply
    12,920.74x = 19,339.18 × 8,482.34
  4. Step 4: Simplify right side
    12,920.74x = 164,041,500.08
  5. Step 5: Solve for x
    x = 164,041,500.08/12,920.74
  6. Step 6: Final answer
    x = 12,695.98

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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.