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Finding the Fourth Proportional to 7,421.28, 10,243.44 and 7,308.96

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Solution

The fourth proportional to 7,421.28, 10,243.44 and 7,308.96 is: 10,088.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.28 : 10,243.44 = 7,308.96 : x
  2. Step 2: Convert to fraction form
    7,421.28/10,243.44 = 7,308.96/x
  3. Step 3: Cross multiply
    7,421.28x = 10,243.44 × 7,308.96
  4. Step 4: Simplify right side
    7,421.28x = 74,868,893.22
  5. Step 5: Solve for x
    x = 74,868,893.22/7,421.28
  6. Step 6: Final answer
    x = 10,088.41

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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.