Home / 31,091.45-42,913.13-19,758.74

Finding the Fourth Proportional to 31,091.45, 42,913.13 and 19,758.74

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Solution

The fourth proportional to 31,091.45, 42,913.13 and 19,758.74 is: 27,271.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,091.45 : 42,913.13 = 19,758.74 : x
  2. Step 2: Convert to fraction form
    31,091.45/42,913.13 = 19,758.74/x
  3. Step 3: Cross multiply
    31,091.45x = 42,913.13 × 19,758.74
  4. Step 4: Simplify right side
    31,091.45x = 847,909,064.90
  5. Step 5: Solve for x
    x = 847,909,064.90/31,091.45
  6. Step 6: Final answer
    x = 27,271.46

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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.