Home / 30,456.78-42,043.31-18,523.95

Finding the Fourth Proportional to 30,456.78, 42,043.31 and 18,523.95

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Solution

The fourth proportional to 30,456.78, 42,043.31 and 18,523.95 is: 25,570.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,456.78 : 42,043.31 = 18,523.95 : x
  2. Step 2: Convert to fraction form
    30,456.78/42,043.31 = 18,523.95/x
  3. Step 3: Cross multiply
    30,456.78x = 42,043.31 × 18,523.95
  4. Step 4: Simplify right side
    30,456.78x = 778,808,172.27
  5. Step 5: Solve for x
    x = 778,808,172.27/30,456.78
  6. Step 6: Final answer
    x = 25,570.93

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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.