Home / 31,115.16-42,938.64-16,968.06

Finding the Fourth Proportional to 31,115.16, 42,938.64 and 16,968.06

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Solution

The fourth proportional to 31,115.16, 42,938.64 and 16,968.06 is: 23,415.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.16 : 42,938.64 = 16,968.06 : x
  2. Step 2: Convert to fraction form
    31,115.16/42,938.64 = 16,968.06/x
  3. Step 3: Cross multiply
    31,115.16x = 42,938.64 × 16,968.06
  4. Step 4: Simplify right side
    31,115.16x = 728,585,419.84
  5. Step 5: Solve for x
    x = 728,585,419.84/31,115.16
  6. Step 6: Final answer
    x = 23,415.77

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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.