Home / 13,868.57-19,136.39-7,900.35

Finding the Fourth Proportional to 13,868.57, 19,136.39 and 7,900.35

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Solution

The fourth proportional to 13,868.57, 19,136.39 and 7,900.35 is: 10,901.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.57 : 19,136.39 = 7,900.35 : x
  2. Step 2: Convert to fraction form
    13,868.57/19,136.39 = 7,900.35/x
  3. Step 3: Cross multiply
    13,868.57x = 19,136.39 × 7,900.35
  4. Step 4: Simplify right side
    13,868.57x = 151,184,139.23
  5. Step 5: Solve for x
    x = 151,184,139.23/13,868.57
  6. Step 6: Final answer
    x = 10,901.21

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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.