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Finding the Fourth Proportional to 28,434.71, 42,660.95 and 8,444.32

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Solution

The fourth proportional to 28,434.71, 42,660.95 and 8,444.32 is: 12,669.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.71 : 42,660.95 = 8,444.32 : x
  2. Step 2: Convert to fraction form
    28,434.71/42,660.95 = 8,444.32/x
  3. Step 3: Cross multiply
    28,434.71x = 42,660.95 × 8,444.32
  4. Step 4: Simplify right side
    28,434.71x = 360,242,635.68
  5. Step 5: Solve for x
    x = 360,242,635.68/28,434.71
  6. Step 6: Final answer
    x = 12,669.11

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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.