Home / 19,870.58-27,423.78-11,917.18

Finding the Fourth Proportional to 19,870.58, 27,423.78 and 11,917.18

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Solution

The fourth proportional to 19,870.58, 27,423.78 and 11,917.18 is: 16,447.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.58 : 27,423.78 = 11,917.18 : x
  2. Step 2: Convert to fraction form
    19,870.58/27,423.78 = 11,917.18/x
  3. Step 3: Cross multiply
    19,870.58x = 27,423.78 × 11,917.18
  4. Step 4: Simplify right side
    19,870.58x = 326,813,955.63
  5. Step 5: Solve for x
    x = 326,813,955.63/19,870.58
  6. Step 6: Final answer
    x = 16,447.13

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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.