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Finding the Fourth Proportional to 8,705.80, 13,058.70 and 7,612.30

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Solution

The fourth proportional to 8,705.80, 13,058.70 and 7,612.30 is: 11,418.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.80 : 13,058.70 = 7,612.30 : x
  2. Step 2: Convert to fraction form
    8,705.80/13,058.70 = 7,612.30/x
  3. Step 3: Cross multiply
    8,705.80x = 13,058.70 × 7,612.30
  4. Step 4: Simplify right side
    8,705.80x = 99,406,742.01
  5. Step 5: Solve for x
    x = 99,406,742.01/8,705.80
  6. Step 6: Final answer
    x = 11,418.45

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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.