Home / 19,101.98-26,339.42-12,378.78

Finding the Fourth Proportional to 19,101.98, 26,339.42 and 12,378.78

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Solution

The fourth proportional to 19,101.98, 26,339.42 and 12,378.78 is: 17,068.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,101.98 : 26,339.42 = 12,378.78 : x
  2. Step 2: Convert to fraction form
    19,101.98/26,339.42 = 12,378.78/x
  3. Step 3: Cross multiply
    19,101.98x = 26,339.42 × 12,378.78
  4. Step 4: Simplify right side
    19,101.98x = 326,049,885.51
  5. Step 5: Solve for x
    x = 326,049,885.51/19,101.98
  6. Step 6: Final answer
    x = 17,068.91

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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.