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Finding the Fourth Proportional to 10,290.60, 15,411.60 and 6,985.80

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Solution

The fourth proportional to 10,290.60, 15,411.60 and 6,985.80 is: 10,462.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,290.60 : 15,411.60 = 6,985.80 : x
  2. Step 2: Convert to fraction form
    10,290.60/15,411.60 = 6,985.80/x
  3. Step 3: Cross multiply
    10,290.60x = 15,411.60 × 6,985.80
  4. Step 4: Simplify right side
    10,290.60x = 107,662,355.28
  5. Step 5: Solve for x
    x = 107,662,355.28/10,290.60
  6. Step 6: Final answer
    x = 10,462.20

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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.