Home / 31,114.40-42,924.32-19,777.80

Finding the Fourth Proportional to 31,114.40, 42,924.32 and 19,777.80

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Solution

The fourth proportional to 31,114.40, 42,924.32 and 19,777.80 is: 27,284.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,114.40 : 42,924.32 = 19,777.80 : x
  2. Step 2: Convert to fraction form
    31,114.40/42,924.32 = 19,777.80/x
  3. Step 3: Cross multiply
    31,114.40x = 42,924.32 × 19,777.80
  4. Step 4: Simplify right side
    31,114.40x = 848,948,616.10
  5. Step 5: Solve for x
    x = 848,948,616.10/31,114.40
  6. Step 6: Final answer
    x = 27,284.75

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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.