Home / 31,125.24-42,954.28-16,978.07

Finding the Fourth Proportional to 31,125.24, 42,954.28 and 16,978.07

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Solution

The fourth proportional to 31,125.24, 42,954.28 and 16,978.07 is: 23,430.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,125.24 : 42,954.28 = 16,978.07 : x
  2. Step 2: Convert to fraction form
    31,125.24/42,954.28 = 16,978.07/x
  3. Step 3: Cross multiply
    31,125.24x = 42,954.28 × 16,978.07
  4. Step 4: Simplify right side
    31,125.24x = 729,280,837.58
  5. Step 5: Solve for x
    x = 729,280,837.58/31,125.24
  6. Step 6: Final answer
    x = 23,430.53

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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.