Home / 30,724.83-42,391.08-18,775.91

Finding the Fourth Proportional to 30,724.83, 42,391.08 and 18,775.91

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Solution

The fourth proportional to 30,724.83, 42,391.08 and 18,775.91 is: 25,905.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,724.83 : 42,391.08 = 18,775.91 : x
  2. Step 2: Convert to fraction form
    30,724.83/42,391.08 = 18,775.91/x
  3. Step 3: Cross multiply
    30,724.83x = 42,391.08 × 18,775.91
  4. Step 4: Simplify right side
    30,724.83x = 795,931,208.86
  5. Step 5: Solve for x
    x = 795,931,208.86/30,724.83
  6. Step 6: Final answer
    x = 25,905.15

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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.