Home / 13,222.32-18,246.70-7,172.55

Finding the Fourth Proportional to 13,222.32, 18,246.70 and 7,172.55

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Solution

The fourth proportional to 13,222.32, 18,246.70 and 7,172.55 is: 9,898.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.32 : 18,246.70 = 7,172.55 : x
  2. Step 2: Convert to fraction form
    13,222.32/18,246.70 = 7,172.55/x
  3. Step 3: Cross multiply
    13,222.32x = 18,246.70 × 7,172.55
  4. Step 4: Simplify right side
    13,222.32x = 130,875,269.81
  5. Step 5: Solve for x
    x = 130,875,269.81/13,222.32
  6. Step 6: Final answer
    x = 9,898.06

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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.