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Finding the Fourth Proportional to 9,113.80, 13,663.40 and 8,384.80

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Solution

The fourth proportional to 9,113.80, 13,663.40 and 8,384.80 is: 12,570.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,113.80 : 13,663.40 = 8,384.80 : x
  2. Step 2: Convert to fraction form
    9,113.80/13,663.40 = 8,384.80/x
  3. Step 3: Cross multiply
    9,113.80x = 13,663.40 × 8,384.80
  4. Step 4: Simplify right side
    9,113.80x = 114,564,876.32
  5. Step 5: Solve for x
    x = 114,564,876.32/9,113.80
  6. Step 6: Final answer
    x = 12,570.48

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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.