Home / 19,870.70-27,423.95-11,917.30

Finding the Fourth Proportional to 19,870.70, 27,423.95 and 11,917.30

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Solution

The fourth proportional to 19,870.70, 27,423.95 and 11,917.30 is: 16,447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.70 : 27,423.95 = 11,917.30 : x
  2. Step 2: Convert to fraction form
    19,870.70/27,423.95 = 11,917.30/x
  3. Step 3: Cross multiply
    19,870.70x = 27,423.95 × 11,917.30
  4. Step 4: Simplify right side
    19,870.70x = 326,819,439.34
  5. Step 5: Solve for x
    x = 326,819,439.34/19,870.70
  6. Step 6: Final answer
    x = 16,447.30

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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.