Home / 30,654.32-42,290.70-19,320.80

Finding the Fourth Proportional to 30,654.32, 42,290.70 and 19,320.80

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Solution

The fourth proportional to 30,654.32, 42,290.70 and 19,320.80 is: 26,654.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,654.32 : 42,290.70 = 19,320.80 : x
  2. Step 2: Convert to fraction form
    30,654.32/42,290.70 = 19,320.80/x
  3. Step 3: Cross multiply
    30,654.32x = 42,290.70 × 19,320.80
  4. Step 4: Simplify right side
    30,654.32x = 817,089,945.11
  5. Step 5: Solve for x
    x = 817,089,945.11/30,654.32
  6. Step 6: Final answer
    x = 26,654.97

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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.