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Finding the Fourth Proportional to 7,890.86, 10,889.17 and 4,353.99

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Solution

The fourth proportional to 7,890.86, 10,889.17 and 4,353.99 is: 6,008.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.86 : 10,889.17 = 4,353.99 : x
  2. Step 2: Convert to fraction form
    7,890.86/10,889.17 = 4,353.99/x
  3. Step 3: Cross multiply
    7,890.86x = 10,889.17 × 4,353.99
  4. Step 4: Simplify right side
    7,890.86x = 47,411,337.29
  5. Step 5: Solve for x
    x = 47,411,337.29/7,890.86
  6. Step 6: Final answer
    x = 6,008.39

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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.