Home / 30,967.75-42,729.21-18,860.11

Finding the Fourth Proportional to 30,967.75, 42,729.21 and 18,860.11

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Solution

The fourth proportional to 30,967.75, 42,729.21 and 18,860.11 is: 26,023.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,967.75 : 42,729.21 = 18,860.11 : x
  2. Step 2: Convert to fraction form
    30,967.75/42,729.21 = 18,860.11/x
  3. Step 3: Cross multiply
    30,967.75x = 42,729.21 × 18,860.11
  4. Step 4: Simplify right side
    30,967.75x = 805,877,600.81
  5. Step 5: Solve for x
    x = 805,877,600.81/30,967.75
  6. Step 6: Final answer
    x = 26,023.12

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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.