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Finding the Fourth Proportional to 13,903.90, 19,187.42 and 7,616.28

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Solution

The fourth proportional to 13,903.90, 19,187.42 and 7,616.28 is: 10,510.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.90 : 19,187.42 = 7,616.28 : x
  2. Step 2: Convert to fraction form
    13,903.90/19,187.42 = 7,616.28/x
  3. Step 3: Cross multiply
    13,903.90x = 19,187.42 × 7,616.28
  4. Step 4: Simplify right side
    13,903.90x = 146,136,763.20
  5. Step 5: Solve for x
    x = 146,136,763.20/13,903.90
  6. Step 6: Final answer
    x = 10,510.49

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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.