Home / 13,938.55-19,235.61-7,889.20

Finding the Fourth Proportional to 13,938.55, 19,235.61 and 7,889.20

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Solution

The fourth proportional to 13,938.55, 19,235.61 and 7,889.20 is: 10,887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.55 : 19,235.61 = 7,889.20 : x
  2. Step 2: Convert to fraction form
    13,938.55/19,235.61 = 7,889.20/x
  3. Step 3: Cross multiply
    13,938.55x = 19,235.61 × 7,889.20
  4. Step 4: Simplify right side
    13,938.55x = 151,753,526.32
  5. Step 5: Solve for x
    x = 151,753,526.32/13,938.55
  6. Step 6: Final answer
    x = 10,887.33

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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.