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Finding the Fourth Proportional to 6,390.32, 8,818.02 and 4,712.63

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Solution

The fourth proportional to 6,390.32, 8,818.02 and 4,712.63 is: 6,502.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390.32 : 8,818.02 = 4,712.63 : x
  2. Step 2: Convert to fraction form
    6,390.32/8,818.02 = 4,712.63/x
  3. Step 3: Cross multiply
    6,390.32x = 8,818.02 × 4,712.63
  4. Step 4: Simplify right side
    6,390.32x = 41,556,031.77
  5. Step 5: Solve for x
    x = 41,556,031.77/6,390.32
  6. Step 6: Final answer
    x = 6,502.97

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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.