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Finding the Fourth Proportional to 10,955.60, 16,424.40 and 4,720.40

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Solution

The fourth proportional to 10,955.60, 16,424.40 and 4,720.40 is: 7,076.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.60 : 16,424.40 = 4,720.40 : x
  2. Step 2: Convert to fraction form
    10,955.60/16,424.40 = 4,720.40/x
  3. Step 3: Cross multiply
    10,955.60x = 16,424.40 × 4,720.40
  4. Step 4: Simplify right side
    10,955.60x = 77,529,737.76
  5. Step 5: Solve for x
    x = 77,529,737.76/10,955.60
  6. Step 6: Final answer
    x = 7,076.72

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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.