Home / 19,985.01-27,580.23-11,489.90

Finding the Fourth Proportional to 19,985.01, 27,580.23 and 11,489.90

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Solution

The fourth proportional to 19,985.01, 27,580.23 and 11,489.90 is: 15,856.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,985.01 : 27,580.23 = 11,489.90 : x
  2. Step 2: Convert to fraction form
    19,985.01/27,580.23 = 11,489.90/x
  3. Step 3: Cross multiply
    19,985.01x = 27,580.23 × 11,489.90
  4. Step 4: Simplify right side
    19,985.01x = 316,893,946.78
  5. Step 5: Solve for x
    x = 316,893,946.78/19,985.01
  6. Step 6: Final answer
    x = 15,856.58

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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.