Home / 31,135.36-42,966.78-16,988.32

Finding the Fourth Proportional to 31,135.36, 42,966.78 and 16,988.32

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Solution

The fourth proportional to 31,135.36, 42,966.78 and 16,988.32 is: 23,443.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,135.36 : 42,966.78 = 16,988.32 : x
  2. Step 2: Convert to fraction form
    31,135.36/42,966.78 = 16,988.32/x
  3. Step 3: Cross multiply
    31,135.36x = 42,966.78 × 16,988.32
  4. Step 4: Simplify right side
    31,135.36x = 729,933,408.01
  5. Step 5: Solve for x
    x = 729,933,408.01/31,135.36
  6. Step 6: Final answer
    x = 23,443.87

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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.