Home / 31,135.98-42,968.19-16,988.94

Finding the Fourth Proportional to 31,135.98, 42,968.19 and 16,988.94

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Solution

The fourth proportional to 31,135.98, 42,968.19 and 16,988.94 is: 23,445.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.98 : 42,968.19 = 16,988.94 : x
  2. Step 2: Convert to fraction form
    31,135.98/42,968.19 = 16,988.94/x
  3. Step 3: Cross multiply
    31,135.98x = 42,968.19 × 16,988.94
  4. Step 4: Simplify right side
    31,135.98x = 729,984,001.82
  5. Step 5: Solve for x
    x = 729,984,001.82/31,135.98
  6. Step 6: Final answer
    x = 23,445.03

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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.