Home / 5,117.51-7,061.76-2,878.98

Finding the Fourth Proportional to 5,117.51, 7,061.76 and 2,878.98

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Solution

The fourth proportional to 5,117.51, 7,061.76 and 2,878.98 is: 3,972.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,117.51 : 7,061.76 = 2,878.98 : x
  2. Step 2: Convert to fraction form
    5,117.51/7,061.76 = 2,878.98/x
  3. Step 3: Cross multiply
    5,117.51x = 7,061.76 × 2,878.98
  4. Step 4: Simplify right side
    5,117.51x = 20,330,665.80
  5. Step 5: Solve for x
    x = 20,330,665.80/5,117.51
  6. Step 6: Final answer
    x = 3,972.77

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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.