Home / 12,415.60-17,133.12-7,109.40

Finding the Fourth Proportional to 12,415.60, 17,133.12 and 7,109.40

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Solution

The fourth proportional to 12,415.60, 17,133.12 and 7,109.40 is: 9,810.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.60 : 17,133.12 = 7,109.40 : x
  2. Step 2: Convert to fraction form
    12,415.60/17,133.12 = 7,109.40/x
  3. Step 3: Cross multiply
    12,415.60x = 17,133.12 × 7,109.40
  4. Step 4: Simplify right side
    12,415.60x = 121,806,123.02
  5. Step 5: Solve for x
    x = 121,806,123.02/12,415.60
  6. Step 6: Final answer
    x = 9,810.73

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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.