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Finding the Fourth Proportional to 6,628.88, 9,931.80 and 4,678.16

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Solution

The fourth proportional to 6,628.88, 9,931.80 and 4,678.16 is: 7,009.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628.88 : 9,931.80 = 4,678.16 : x
  2. Step 2: Convert to fraction form
    6,628.88/9,931.80 = 4,678.16/x
  3. Step 3: Cross multiply
    6,628.88x = 9,931.80 × 4,678.16
  4. Step 4: Simplify right side
    6,628.88x = 46,462,549.49
  5. Step 5: Solve for x
    x = 46,462,549.49/6,628.88
  6. Step 6: Final answer
    x = 7,009.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.