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Finding the Fourth Proportional to 8,307.79, 12,461.55 and 3,928.39

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Solution

The fourth proportional to 8,307.79, 12,461.55 and 3,928.39 is: 5,892.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,307.79 : 12,461.55 = 3,928.39 : x
  2. Step 2: Convert to fraction form
    8,307.79/12,461.55 = 3,928.39/x
  3. Step 3: Cross multiply
    8,307.79x = 12,461.55 × 3,928.39
  4. Step 4: Simplify right side
    8,307.79x = 48,953,828.40
  5. Step 5: Solve for x
    x = 48,953,828.40/8,307.79
  6. Step 6: Final answer
    x = 5,892.52

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1.5x scale

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.