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Finding the Fourth Proportional to 6,988.40, 9,636.80 and 4,866.40

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Solution

The fourth proportional to 6,988.40, 9,636.80 and 4,866.40 is: 6,710.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988.40 : 9,636.80 = 4,866.40 : x
  2. Step 2: Convert to fraction form
    6,988.40/9,636.80 = 4,866.40/x
  3. Step 3: Cross multiply
    6,988.40x = 9,636.80 × 4,866.40
  4. Step 4: Simplify right side
    6,988.40x = 46,896,523.52
  5. Step 5: Solve for x
    x = 46,896,523.52/6,988.40
  6. Step 6: Final answer
    x = 6,710.62

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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.