Home / 9,415.58-12,991.70-5,383.68

Finding the Fourth Proportional to 9,415.58, 12,991.70 and 5,383.68

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Solution

The fourth proportional to 9,415.58, 12,991.70 and 5,383.68 is: 7,428.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,415.58 : 12,991.70 = 5,383.68 : x
  2. Step 2: Convert to fraction form
    9,415.58/12,991.70 = 5,383.68/x
  3. Step 3: Cross multiply
    9,415.58x = 12,991.70 × 5,383.68
  4. Step 4: Simplify right side
    9,415.58x = 69,943,155.46
  5. Step 5: Solve for x
    x = 69,943,155.46/9,415.58
  6. Step 6: Final answer
    x = 7,428.45

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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.