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Finding the Fourth Proportional to 9,365.70, 12,898.35 and 9,161.58

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Solution

The fourth proportional to 9,365.70, 12,898.35 and 9,161.58 is: 12,617.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,365.70 : 12,898.35 = 9,161.58 : x
  2. Step 2: Convert to fraction form
    9,365.70/12,898.35 = 9,161.58/x
  3. Step 3: Cross multiply
    9,365.70x = 12,898.35 × 9,161.58
  4. Step 4: Simplify right side
    9,365.70x = 118,169,266.45
  5. Step 5: Solve for x
    x = 118,169,266.45/9,365.70
  6. Step 6: Final answer
    x = 12,617.24

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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.