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Finding the Fourth Proportional to 8,718,685.76, 12,031,775.07 and 5,409,749.30

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Solution

The fourth proportional to 8,718,685.76, 12,031,775.07 and 5,409,749.30 is: 7,465,447.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718,685.76 : 12,031,775.07 = 5,409,749.30 : x
  2. Step 2: Convert to fraction form
    8,718,685.76/12,031,775.07 = 5,409,749.30/x
  3. Step 3: Cross multiply
    8,718,685.76x = 12,031,775.07 × 5,409,749.30
  4. Step 4: Simplify right side
    8,718,685.76x = 65,088,886,702,531.08
  5. Step 5: Solve for x
    x = 65,088,886,702,531.08/8,718,685.76
  6. Step 6: Final answer
    x = 7,465,447.03

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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.