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Finding the Fourth Proportional to 14,645.40, 20,210.69 and 7,931.11

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Solution

The fourth proportional to 14,645.40, 20,210.69 and 7,931.11 is: 10,944.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,645.40 : 20,210.69 = 7,931.11 : x
  2. Step 2: Convert to fraction form
    14,645.40/20,210.69 = 7,931.11/x
  3. Step 3: Cross multiply
    14,645.40x = 20,210.69 × 7,931.11
  4. Step 4: Simplify right side
    14,645.40x = 160,293,205.57
  5. Step 5: Solve for x
    x = 160,293,205.57/14,645.40
  6. Step 6: Final answer
    x = 10,944.95

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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.