Home / 19,788.18-27,315.27-13,509.06

Finding the Fourth Proportional to 19,788.18, 27,315.27 and 13,509.06

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Solution

The fourth proportional to 19,788.18, 27,315.27 and 13,509.06 is: 18,647.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,788.18 : 27,315.27 = 13,509.06 : x
  2. Step 2: Convert to fraction form
    19,788.18/27,315.27 = 13,509.06/x
  3. Step 3: Cross multiply
    19,788.18x = 27,315.27 × 13,509.06
  4. Step 4: Simplify right side
    19,788.18x = 369,003,621.35
  5. Step 5: Solve for x
    x = 369,003,621.35/19,788.18
  6. Step 6: Final answer
    x = 18,647.68

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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.