Home / 30,470.30-42,031.40-18,362.52

Finding the Fourth Proportional to 30,470.30, 42,031.40 and 18,362.52

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Solution

The fourth proportional to 30,470.30, 42,031.40 and 18,362.52 is: 25,329.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,470.30 : 42,031.40 = 18,362.52 : x
  2. Step 2: Convert to fraction form
    30,470.30/42,031.40 = 18,362.52/x
  3. Step 3: Cross multiply
    30,470.30x = 42,031.40 × 18,362.52
  4. Step 4: Simplify right side
    30,470.30x = 771,802,331.32
  5. Step 5: Solve for x
    x = 771,802,331.32/30,470.30
  6. Step 6: Final answer
    x = 25,329.66

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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.