Home / 13,739.02-18,959.80-7,451.40

Finding the Fourth Proportional to 13,739.02, 18,959.80 and 7,451.40

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Solution

The fourth proportional to 13,739.02, 18,959.80 and 7,451.40 is: 10,282.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.02 : 18,959.80 = 7,451.40 : x
  2. Step 2: Convert to fraction form
    13,739.02/18,959.80 = 7,451.40/x
  3. Step 3: Cross multiply
    13,739.02x = 18,959.80 × 7,451.40
  4. Step 4: Simplify right side
    13,739.02x = 141,277,053.72
  5. Step 5: Solve for x
    x = 141,277,053.72/13,739.02
  6. Step 6: Final answer
    x = 10,282.91

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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.