Home / 19,980.12-27,585.72-12,437.40

Finding the Fourth Proportional to 19,980.12, 27,585.72 and 12,437.40

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Solution

The fourth proportional to 19,980.12, 27,585.72 and 12,437.40 is: 17,171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.12 : 27,585.72 = 12,437.40 : x
  2. Step 2: Convert to fraction form
    19,980.12/27,585.72 = 12,437.40/x
  3. Step 3: Cross multiply
    19,980.12x = 27,585.72 × 12,437.40
  4. Step 4: Simplify right side
    19,980.12x = 343,094,633.93
  5. Step 5: Solve for x
    x = 343,094,633.93/19,980.12
  6. Step 6: Final answer
    x = 17,171.80

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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.