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Finding the Fourth Proportional to 9,899.61, 13,661.40 and 5,423.39

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Solution

The fourth proportional to 9,899.61, 13,661.40 and 5,423.39 is: 7,484.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,899.61 : 13,661.40 = 5,423.39 : x
  2. Step 2: Convert to fraction form
    9,899.61/13,661.40 = 5,423.39/x
  3. Step 3: Cross multiply
    9,899.61x = 13,661.40 × 5,423.39
  4. Step 4: Simplify right side
    9,899.61x = 74,091,103.41
  5. Step 5: Solve for x
    x = 74,091,103.41/9,899.61
  6. Step 6: Final answer
    x = 7,484.25

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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.