Home / 12,985.36-17,919.40-7,396.08

Finding the Fourth Proportional to 12,985.36, 17,919.40 and 7,396.08

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Solution

The fourth proportional to 12,985.36, 17,919.40 and 7,396.08 is: 10,206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.36 : 17,919.40 = 7,396.08 : x
  2. Step 2: Convert to fraction form
    12,985.36/17,919.40 = 7,396.08/x
  3. Step 3: Cross multiply
    12,985.36x = 17,919.40 × 7,396.08
  4. Step 4: Simplify right side
    12,985.36x = 132,533,315.95
  5. Step 5: Solve for x
    x = 132,533,315.95/12,985.36
  6. Step 6: Final answer
    x = 10,206.36

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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.