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Finding the Fourth Proportional to 29,641.40, 40,886.42 and 20,685.63

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Solution

The fourth proportional to 29,641.40, 40,886.42 and 20,685.63 is: 28,533.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,641.40 : 40,886.42 = 20,685.63 : x
  2. Step 2: Convert to fraction form
    29,641.40/40,886.42 = 20,685.63/x
  3. Step 3: Cross multiply
    29,641.40x = 40,886.42 × 20,685.63
  4. Step 4: Simplify right side
    29,641.40x = 845,761,252.72
  5. Step 5: Solve for x
    x = 845,761,252.72/29,641.40
  6. Step 6: Final answer
    x = 28,533.11

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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.