Home / 13,290.22-19,935.35-12,478.30

Finding the Fourth Proportional to 13,290.22, 19,935.35 and 12,478.30

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Solution

The fourth proportional to 13,290.22, 19,935.35 and 12,478.30 is: 18,717.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.22 : 19,935.35 = 12,478.30 : x
  2. Step 2: Convert to fraction form
    13,290.22/19,935.35 = 12,478.30/x
  3. Step 3: Cross multiply
    13,290.22x = 19,935.35 × 12,478.30
  4. Step 4: Simplify right side
    13,290.22x = 248,759,282.66
  5. Step 5: Solve for x
    x = 248,759,282.66/13,290.22
  6. Step 6: Final answer
    x = 18,717.47

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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.