Home / 30,575.12-42,178.14-19,970.96

Finding the Fourth Proportional to 30,575.12, 42,178.14 and 19,970.96

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Solution

The fourth proportional to 30,575.12, 42,178.14 and 19,970.96 is: 27,549.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,575.12 : 42,178.14 = 19,970.96 : x
  2. Step 2: Convert to fraction form
    30,575.12/42,178.14 = 19,970.96/x
  3. Step 3: Cross multiply
    30,575.12x = 42,178.14 × 19,970.96
  4. Step 4: Simplify right side
    30,575.12x = 842,337,946.81
  5. Step 5: Solve for x
    x = 842,337,946.81/30,575.12
  6. Step 6: Final answer
    x = 27,549.78

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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.