Home / 19,967.76-27,561.96-12,888.72

Finding the Fourth Proportional to 19,967.76, 27,561.96 and 12,888.72

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Solution

The fourth proportional to 19,967.76, 27,561.96 and 12,888.72 is: 17,790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,967.76 : 27,561.96 = 12,888.72 : x
  2. Step 2: Convert to fraction form
    19,967.76/27,561.96 = 12,888.72/x
  3. Step 3: Cross multiply
    19,967.76x = 27,561.96 × 12,888.72
  4. Step 4: Simplify right side
    19,967.76x = 355,238,385.09
  5. Step 5: Solve for x
    x = 355,238,385.09/19,967.76
  6. Step 6: Final answer
    x = 17,790.60

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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.