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Finding the Fourth Proportional to 43,615.80, 65,423.70 and 21,443.40

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Solution

The fourth proportional to 43,615.80, 65,423.70 and 21,443.40 is: 32,165.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,615.80 : 65,423.70 = 21,443.40 : x
  2. Step 2: Convert to fraction form
    43,615.80/65,423.70 = 21,443.40/x
  3. Step 3: Cross multiply
    43,615.80x = 65,423.70 × 21,443.40
  4. Step 4: Simplify right side
    43,615.80x = 1,402,906,568.58
  5. Step 5: Solve for x
    x = 1,402,906,568.58/43,615.80
  6. Step 6: Final answer
    x = 32,165.10

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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.