Home / 12,980.28-19,468.56-7,415.58

Finding the Fourth Proportional to 12,980.28, 19,468.56 and 7,415.58

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Solution

The fourth proportional to 12,980.28, 19,468.56 and 7,415.58 is: 11,122.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.28 : 19,468.56 = 7,415.58 : x
  2. Step 2: Convert to fraction form
    12,980.28/19,468.56 = 7,415.58/x
  3. Step 3: Cross multiply
    12,980.28x = 19,468.56 × 7,415.58
  4. Step 4: Simplify right side
    12,980.28x = 144,370,664.16
  5. Step 5: Solve for x
    x = 144,370,664.16/12,980.28
  6. Step 6: Final answer
    x = 11,122.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.