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Finding the Fourth Proportional to 9,955.58, 13,696.19 and 9,678.76

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Solution

The fourth proportional to 9,955.58, 13,696.19 and 9,678.76 is: 13,315.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.58 : 13,696.19 = 9,678.76 : x
  2. Step 2: Convert to fraction form
    9,955.58/13,696.19 = 9,678.76/x
  3. Step 3: Cross multiply
    9,955.58x = 13,696.19 × 9,678.76
  4. Step 4: Simplify right side
    9,955.58x = 132,562,089.59
  5. Step 5: Solve for x
    x = 132,562,089.59/9,955.58
  6. Step 6: Final answer
    x = 13,315.36

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Double scale
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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.