Home / 9,678.33-13,355.02-5,428.51

Finding the Fourth Proportional to 9,678.33, 13,355.02 and 5,428.51

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Solution

The fourth proportional to 9,678.33, 13,355.02 and 5,428.51 is: 7,490.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,678.33 : 13,355.02 = 5,428.51 : x
  2. Step 2: Convert to fraction form
    9,678.33/13,355.02 = 5,428.51/x
  3. Step 3: Cross multiply
    9,678.33x = 13,355.02 × 5,428.51
  4. Step 4: Simplify right side
    9,678.33x = 72,497,859.62
  5. Step 5: Solve for x
    x = 72,497,859.62/9,678.33
  6. Step 6: Final answer
    x = 7,490.74

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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.