Home / 12,903.40-17,808.16-7,239.66

Finding the Fourth Proportional to 12,903.40, 17,808.16 and 7,239.66

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Solution

The fourth proportional to 12,903.40, 17,808.16 and 7,239.66 is: 9,991.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.40 : 17,808.16 = 7,239.66 : x
  2. Step 2: Convert to fraction form
    12,903.40/17,808.16 = 7,239.66/x
  3. Step 3: Cross multiply
    12,903.40x = 17,808.16 × 7,239.66
  4. Step 4: Simplify right side
    12,903.40x = 128,925,023.63
  5. Step 5: Solve for x
    x = 128,925,023.63/12,903.40
  6. Step 6: Final answer
    x = 9,991.55

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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.