Home / 12,818.40-19,100.16-11,421

Finding the Fourth Proportional to 12,818.40, 19,100.16 and 11,421

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Solution

The fourth proportional to 12,818.40, 19,100.16 and 11,421 is: 17,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,818.40 : 19,100.16 = 11,421 : x
  2. Step 2: Convert to fraction form
    12,818.40/19,100.16 = 11,421/x
  3. Step 3: Cross multiply
    12,818.40x = 19,100.16 × 11,421
  4. Step 4: Simplify right side
    12,818.40x = 218,142,927.36
  5. Step 5: Solve for x
    x = 218,142,927.36/12,818.40
  6. Step 6: Final answer
    x = 17,017.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.