Home / 8,690.16-11,988.45-5,151.36

Finding the Fourth Proportional to 8,690.16, 11,988.45 and 5,151.36

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Solution

The fourth proportional to 8,690.16, 11,988.45 and 5,151.36 is: 7,106.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.16 : 11,988.45 = 5,151.36 : x
  2. Step 2: Convert to fraction form
    8,690.16/11,988.45 = 5,151.36/x
  3. Step 3: Cross multiply
    8,690.16x = 11,988.45 × 5,151.36
  4. Step 4: Simplify right side
    8,690.16x = 61,756,821.79
  5. Step 5: Solve for x
    x = 61,756,821.79/8,690.16
  6. Step 6: Final answer
    x = 7,106.52

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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.