Home / 31,125.90-42,954.10-16,978.98

Finding the Fourth Proportional to 31,125.90, 42,954.10 and 16,978.98

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Solution

The fourth proportional to 31,125.90, 42,954.10 and 16,978.98 is: 23,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,125.90 : 42,954.10 = 16,978.98 : x
  2. Step 2: Convert to fraction form
    31,125.90/42,954.10 = 16,978.98/x
  3. Step 3: Cross multiply
    31,125.90x = 42,954.10 × 16,978.98
  4. Step 4: Simplify right side
    31,125.90x = 729,316,804.82
  5. Step 5: Solve for x
    x = 729,316,804.82/31,125.90
  6. Step 6: Final answer
    x = 23,431.19

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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.