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Finding the Fourth Proportional to 9,855, 13,599.96 and 5,663.28

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Solution

The fourth proportional to 9,855, 13,599.96 and 5,663.28 is: 7,815.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,855 : 13,599.96 = 5,663.28 : x
  2. Step 2: Convert to fraction form
    9,855/13,599.96 = 5,663.28/x
  3. Step 3: Cross multiply
    9,855x = 13,599.96 × 5,663.28
  4. Step 4: Simplify right side
    9,855x = 77,020,381.47
  5. Step 5: Solve for x
    x = 77,020,381.47/9,855
  6. Step 6: Final answer
    x = 7,815.36

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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.