Home / 19,987.53-27,569.48-12,021.39

Finding the Fourth Proportional to 19,987.53, 27,569.48 and 12,021.39

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Solution

The fourth proportional to 19,987.53, 27,569.48 and 12,021.39 is: 16,581.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.53 : 27,569.48 = 12,021.39 : x
  2. Step 2: Convert to fraction form
    19,987.53/27,569.48 = 12,021.39/x
  3. Step 3: Cross multiply
    19,987.53x = 27,569.48 × 12,021.39
  4. Step 4: Simplify right side
    19,987.53x = 331,423,411.07
  5. Step 5: Solve for x
    x = 331,423,411.07/19,987.53
  6. Step 6: Final answer
    x = 16,581.51

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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.