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Finding the Fourth Proportional to 7,911.17, 10,916.62 and 4,374.15

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Solution

The fourth proportional to 7,911.17, 10,916.62 and 4,374.15 is: 6,035.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.17 : 10,916.62 = 4,374.15 : x
  2. Step 2: Convert to fraction form
    7,911.17/10,916.62 = 4,374.15/x
  3. Step 3: Cross multiply
    7,911.17x = 10,916.62 × 4,374.15
  4. Step 4: Simplify right side
    7,911.17x = 47,750,967.51
  5. Step 5: Solve for x
    x = 47,750,967.51/7,911.17
  6. Step 6: Final answer
    x = 6,035.89

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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.