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Finding the Fourth Proportional to 30,386.70, 41,928.30 and 16,956.90

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Solution

The fourth proportional to 30,386.70, 41,928.30 and 16,956.90 is: 23,397.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,386.70 : 41,928.30 = 16,956.90 : x
  2. Step 2: Convert to fraction form
    30,386.70/41,928.30 = 16,956.90/x
  3. Step 3: Cross multiply
    30,386.70x = 41,928.30 × 16,956.90
  4. Step 4: Simplify right side
    30,386.70x = 710,973,990.27
  5. Step 5: Solve for x
    x = 710,973,990.27/30,386.70
  6. Step 6: Final answer
    x = 23,397.54

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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.