Home / 30,995.36-42,770.40-18,417.68

Finding the Fourth Proportional to 30,995.36, 42,770.40 and 18,417.68

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Solution

The fourth proportional to 30,995.36, 42,770.40 and 18,417.68 is: 25,414.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,995.36 : 42,770.40 = 18,417.68 : x
  2. Step 2: Convert to fraction form
    30,995.36/42,770.40 = 18,417.68/x
  3. Step 3: Cross multiply
    30,995.36x = 42,770.40 × 18,417.68
  4. Step 4: Simplify right side
    30,995.36x = 787,731,540.67
  5. Step 5: Solve for x
    x = 787,731,540.67/30,995.36
  6. Step 6: Final answer
    x = 25,414.50

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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.