Home / 31,015.16-42,805.01-30,170.77

Finding the Fourth Proportional to 31,015.16, 42,805.01 and 30,170.77

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Solution

The fourth proportional to 31,015.16, 42,805.01 and 30,170.77 is: 41,639.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,015.16 : 42,805.01 = 30,170.77 : x
  2. Step 2: Convert to fraction form
    31,015.16/42,805.01 = 30,170.77/x
  3. Step 3: Cross multiply
    31,015.16x = 42,805.01 × 30,170.77
  4. Step 4: Simplify right side
    31,015.16x = 1,291,459,960.70
  5. Step 5: Solve for x
    x = 1,291,459,960.70/31,015.16
  6. Step 6: Final answer
    x = 41,639.64

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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.