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Finding the Fourth Proportional to 8,920.13, 12,309.95 and 4,941.37

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Solution

The fourth proportional to 8,920.13, 12,309.95 and 4,941.37 is: 6,819.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.13 : 12,309.95 = 4,941.37 : x
  2. Step 2: Convert to fraction form
    8,920.13/12,309.95 = 4,941.37/x
  3. Step 3: Cross multiply
    8,920.13x = 12,309.95 × 4,941.37
  4. Step 4: Simplify right side
    8,920.13x = 60,827,931.37
  5. Step 5: Solve for x
    x = 60,827,931.37/8,920.13
  6. Step 6: Final answer
    x = 6,819.18

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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.