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Finding the Fourth Proportional to 10,917.60, 16,368.30 and 4,340.40

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Solution

The fourth proportional to 10,917.60, 16,368.30 and 4,340.40 is: 6,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.60 : 16,368.30 = 4,340.40 : x
  2. Step 2: Convert to fraction form
    10,917.60/16,368.30 = 4,340.40/x
  3. Step 3: Cross multiply
    10,917.60x = 16,368.30 × 4,340.40
  4. Step 4: Simplify right side
    10,917.60x = 71,044,969.32
  5. Step 5: Solve for x
    x = 71,044,969.32/10,917.60
  6. Step 6: Final answer
    x = 6,507.38

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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.