Home / 31,055.45-42,850.67-18,312.63

Finding the Fourth Proportional to 31,055.45, 42,850.67 and 18,312.63

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Solution

The fourth proportional to 31,055.45, 42,850.67 and 18,312.63 is: 25,267.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,055.45 : 42,850.67 = 18,312.63 : x
  2. Step 2: Convert to fraction form
    31,055.45/42,850.67 = 18,312.63/x
  3. Step 3: Cross multiply
    31,055.45x = 42,850.67 × 18,312.63
  4. Step 4: Simplify right side
    31,055.45x = 784,708,556.75
  5. Step 5: Solve for x
    x = 784,708,556.75/31,055.45
  6. Step 6: Final answer
    x = 25,267.98

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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.