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Finding the Fourth Proportional to 30,947.84, 42,708.04 and 16,800.70

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Solution

The fourth proportional to 30,947.84, 42,708.04 and 16,800.70 is: 23,184.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,947.84 : 42,708.04 = 16,800.70 : x
  2. Step 2: Convert to fraction form
    30,947.84/42,708.04 = 16,800.70/x
  3. Step 3: Cross multiply
    30,947.84x = 42,708.04 × 16,800.70
  4. Step 4: Simplify right side
    30,947.84x = 717,524,967.63
  5. Step 5: Solve for x
    x = 717,524,967.63/30,947.84
  6. Step 6: Final answer
    x = 23,184.98

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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.