Home / 9,407.19-12,981.80-5,428.22

Finding the Fourth Proportional to 9,407.19, 12,981.80 and 5,428.22

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Solution

The fourth proportional to 9,407.19, 12,981.80 and 5,428.22 is: 7,490.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,407.19 : 12,981.80 = 5,428.22 : x
  2. Step 2: Convert to fraction form
    9,407.19/12,981.80 = 5,428.22/x
  3. Step 3: Cross multiply
    9,407.19x = 12,981.80 × 5,428.22
  4. Step 4: Simplify right side
    9,407.19x = 70,468,015.06
  5. Step 5: Solve for x
    x = 70,468,015.06/9,407.19
  6. Step 6: Final answer
    x = 7,490.87

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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.