Home / 30,918.60-42,697.98-21,382.92

Finding the Fourth Proportional to 30,918.60, 42,697.98 and 21,382.92

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Solution

The fourth proportional to 30,918.60, 42,697.98 and 21,382.92 is: 29,529.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.60 : 42,697.98 = 21,382.92 : x
  2. Step 2: Convert to fraction form
    30,918.60/42,697.98 = 21,382.92/x
  3. Step 3: Cross multiply
    30,918.60x = 42,697.98 × 21,382.92
  4. Step 4: Simplify right side
    30,918.60x = 913,007,490.50
  5. Step 5: Solve for x
    x = 913,007,490.50/30,918.60
  6. Step 6: Final answer
    x = 29,529.39

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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.