Home / 19,878.68-27,430.98-11,495.72

Finding the Fourth Proportional to 19,878.68, 27,430.98 and 11,495.72

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Solution

The fourth proportional to 19,878.68, 27,430.98 and 11,495.72 is: 15,863.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.68 : 27,430.98 = 11,495.72 : x
  2. Step 2: Convert to fraction form
    19,878.68/27,430.98 = 11,495.72/x
  3. Step 3: Cross multiply
    19,878.68x = 27,430.98 × 11,495.72
  4. Step 4: Simplify right side
    19,878.68x = 315,338,865.41
  5. Step 5: Solve for x
    x = 315,338,865.41/19,878.68
  6. Step 6: Final answer
    x = 15,863.17

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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.