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Finding the Fourth Proportional to 7,865.64, 10,854.48 and 4,328.76

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Solution

The fourth proportional to 7,865.64, 10,854.48 and 4,328.76 is: 5,973.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,865.64 : 10,854.48 = 4,328.76 : x
  2. Step 2: Convert to fraction form
    7,865.64/10,854.48 = 4,328.76/x
  3. Step 3: Cross multiply
    7,865.64x = 10,854.48 × 4,328.76
  4. Step 4: Simplify right side
    7,865.64x = 46,986,438.84
  5. Step 5: Solve for x
    x = 46,986,438.84/7,865.64
  6. Step 6: Final answer
    x = 5,973.63

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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.