Home / 13,188.81-18,200.61-7,220.52

Finding the Fourth Proportional to 13,188.81, 18,200.61 and 7,220.52

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Solution

The fourth proportional to 13,188.81, 18,200.61 and 7,220.52 is: 9,964.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.81 : 18,200.61 = 7,220.52 : x
  2. Step 2: Convert to fraction form
    13,188.81/18,200.61 = 7,220.52/x
  3. Step 3: Cross multiply
    13,188.81x = 18,200.61 × 7,220.52
  4. Step 4: Simplify right side
    13,188.81x = 131,417,868.52
  5. Step 5: Solve for x
    x = 131,417,868.52/13,188.81
  6. Step 6: Final answer
    x = 9,964.35

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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.