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Finding the Fourth Proportional to 26,688, 40,031.08 and 12,654.74

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Solution

The fourth proportional to 26,688, 40,031.08 and 12,654.74 is: 18,981.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,688 : 40,031.08 = 12,654.74 : x
  2. Step 2: Convert to fraction form
    26,688/40,031.08 = 12,654.74/x
  3. Step 3: Cross multiply
    26,688x = 40,031.08 × 12,654.74
  4. Step 4: Simplify right side
    26,688x = 506,582,909.32
  5. Step 5: Solve for x
    x = 506,582,909.32/26,688
  6. Step 6: Final answer
    x = 18,981.67

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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.