Home / 8,421.84-11,618.91-5,065.47

Finding the Fourth Proportional to 8,421.84, 11,618.91 and 5,065.47

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Solution

The fourth proportional to 8,421.84, 11,618.91 and 5,065.47 is: 6,988.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.84 : 11,618.91 = 5,065.47 : x
  2. Step 2: Convert to fraction form
    8,421.84/11,618.91 = 5,065.47/x
  3. Step 3: Cross multiply
    8,421.84x = 11,618.91 × 5,065.47
  4. Step 4: Simplify right side
    8,421.84x = 58,855,240.04
  5. Step 5: Solve for x
    x = 58,855,240.04/8,421.84
  6. Step 6: Final answer
    x = 6,988.41

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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.