Home / 13,137.04-18,128.40-7,471.02

Finding the Fourth Proportional to 13,137.04, 18,128.40 and 7,471.02

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Solution

The fourth proportional to 13,137.04, 18,128.40 and 7,471.02 is: 10,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.04 : 18,128.40 = 7,471.02 : x
  2. Step 2: Convert to fraction form
    13,137.04/18,128.40 = 7,471.02/x
  3. Step 3: Cross multiply
    13,137.04x = 18,128.40 × 7,471.02
  4. Step 4: Simplify right side
    13,137.04x = 135,437,601.61
  5. Step 5: Solve for x
    x = 135,437,601.61/13,137.04
  6. Step 6: Final answer
    x = 10,309.60

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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.