Home / 12,904.80-19,328.40-9,967.20

Finding the Fourth Proportional to 12,904.80, 19,328.40 and 9,967.20

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Solution

The fourth proportional to 12,904.80, 19,328.40 and 9,967.20 is: 14,928.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.80 : 19,328.40 = 9,967.20 : x
  2. Step 2: Convert to fraction form
    12,904.80/19,328.40 = 9,967.20/x
  3. Step 3: Cross multiply
    12,904.80x = 19,328.40 × 9,967.20
  4. Step 4: Simplify right side
    12,904.80x = 192,650,028.48
  5. Step 5: Solve for x
    x = 192,650,028.48/12,904.80
  6. Step 6: Final answer
    x = 14,928.56

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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.