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Finding the Fourth Proportional to 14,627.94, 20,186.47 and 7,913.55

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Solution

The fourth proportional to 14,627.94, 20,186.47 and 7,913.55 is: 10,920.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,627.94 : 20,186.47 = 7,913.55 : x
  2. Step 2: Convert to fraction form
    14,627.94/20,186.47 = 7,913.55/x
  3. Step 3: Cross multiply
    14,627.94x = 20,186.47 × 7,913.55
  4. Step 4: Simplify right side
    14,627.94x = 159,746,639.67
  5. Step 5: Solve for x
    x = 159,746,639.67/14,627.94
  6. Step 6: Final answer
    x = 10,920.65

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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.