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Finding the Fourth Proportional to 28,692.72, 43,041.56 and 7,916.22

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Solution

The fourth proportional to 28,692.72, 43,041.56 and 7,916.22 is: 11,875.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,692.72 : 43,041.56 = 7,916.22 : x
  2. Step 2: Convert to fraction form
    28,692.72/43,041.56 = 7,916.22/x
  3. Step 3: Cross multiply
    28,692.72x = 43,041.56 × 7,916.22
  4. Step 4: Simplify right side
    28,692.72x = 340,726,458.10
  5. Step 5: Solve for x
    x = 340,726,458.10/28,692.72
  6. Step 6: Final answer
    x = 11,875.01

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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.