Home / 15,814.40-21,820.80-11,091.20

Finding the Fourth Proportional to 15,814.40, 21,820.80 and 11,091.20

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Solution

The fourth proportional to 15,814.40, 21,820.80 and 11,091.20 is: 15,303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,814.40 : 21,820.80 = 11,091.20 : x
  2. Step 2: Convert to fraction form
    15,814.40/21,820.80 = 11,091.20/x
  3. Step 3: Cross multiply
    15,814.40x = 21,820.80 × 11,091.20
  4. Step 4: Simplify right side
    15,814.40x = 242,018,856.96
  5. Step 5: Solve for x
    x = 242,018,856.96/15,814.40
  6. Step 6: Final answer
    x = 15,303.70

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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.