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Finding the Fourth Proportional to 10,989.78, 16,487.55 and 4,835.22

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Solution

The fourth proportional to 10,989.78, 16,487.55 and 4,835.22 is: 7,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.78 : 16,487.55 = 4,835.22 : x
  2. Step 2: Convert to fraction form
    10,989.78/16,487.55 = 4,835.22/x
  3. Step 3: Cross multiply
    10,989.78x = 16,487.55 × 4,835.22
  4. Step 4: Simplify right side
    10,989.78x = 79,720,931.51
  5. Step 5: Solve for x
    x = 79,720,931.51/10,989.78
  6. Step 6: Final answer
    x = 7,254.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.