Home / 30,767.78-42,458.88-18,019.40

Finding the Fourth Proportional to 30,767.78, 42,458.88 and 18,019.40

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Solution

The fourth proportional to 30,767.78, 42,458.88 and 18,019.40 is: 24,866.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,767.78 : 42,458.88 = 18,019.40 : x
  2. Step 2: Convert to fraction form
    30,767.78/42,458.88 = 18,019.40/x
  3. Step 3: Cross multiply
    30,767.78x = 42,458.88 × 18,019.40
  4. Step 4: Simplify right side
    30,767.78x = 765,083,397.55
  5. Step 5: Solve for x
    x = 765,083,397.55/30,767.78
  6. Step 6: Final answer
    x = 24,866.38

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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.