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Finding the Fourth Proportional to 6,478.71, 8,928.14 and 4,707.51

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Solution

The fourth proportional to 6,478.71, 8,928.14 and 4,707.51 is: 6,487.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,478.71 : 8,928.14 = 4,707.51 : x
  2. Step 2: Convert to fraction form
    6,478.71/8,928.14 = 4,707.51/x
  3. Step 3: Cross multiply
    6,478.71x = 8,928.14 × 4,707.51
  4. Step 4: Simplify right side
    6,478.71x = 42,029,284.79
  5. Step 5: Solve for x
    x = 42,029,284.79/6,478.71
  6. Step 6: Final answer
    x = 6,487.29

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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.