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Finding the Fourth Proportional to 12,312.60, 18,461.60 and 4,920.54

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Solution

The fourth proportional to 12,312.60, 18,461.60 and 4,920.54 is: 7,377.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.60 : 18,461.60 = 4,920.54 : x
  2. Step 2: Convert to fraction form
    12,312.60/18,461.60 = 4,920.54/x
  3. Step 3: Cross multiply
    12,312.60x = 18,461.60 × 4,920.54
  4. Step 4: Simplify right side
    12,312.60x = 90,841,041.26
  5. Step 5: Solve for x
    x = 90,841,041.26/12,312.60
  6. Step 6: Final answer
    x = 7,377.89

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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.