Home / 13,731.08-18,947.82-7,762.28

Finding the Fourth Proportional to 13,731.08, 18,947.82 and 7,762.28

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Solution

The fourth proportional to 13,731.08, 18,947.82 and 7,762.28 is: 10,711.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.08 : 18,947.82 = 7,762.28 : x
  2. Step 2: Convert to fraction form
    13,731.08/18,947.82 = 7,762.28/x
  3. Step 3: Cross multiply
    13,731.08x = 18,947.82 × 7,762.28
  4. Step 4: Simplify right side
    13,731.08x = 147,078,284.23
  5. Step 5: Solve for x
    x = 147,078,284.23/13,731.08
  6. Step 6: Final answer
    x = 10,711.34

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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.