Home / 30,663.18-42,316.70-18,724.59

Finding the Fourth Proportional to 30,663.18, 42,316.70 and 18,724.59

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Solution

The fourth proportional to 30,663.18, 42,316.70 and 18,724.59 is: 25,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,663.18 : 42,316.70 = 18,724.59 : x
  2. Step 2: Convert to fraction form
    30,663.18/42,316.70 = 18,724.59/x
  3. Step 3: Cross multiply
    30,663.18x = 42,316.70 × 18,724.59
  4. Step 4: Simplify right side
    30,663.18x = 792,362,764.03
  5. Step 5: Solve for x
    x = 792,362,764.03/30,663.18
  6. Step 6: Final answer
    x = 25,840.85

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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.