Home / 20,478,140.21-28,259,641.01-11,185,705.71

Finding the Fourth Proportional to 20,478,140.21, 28,259,641.01 and 11,185,705.71

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Solution

The fourth proportional to 20,478,140.21, 28,259,641.01 and 11,185,705.71 is: 15,436,168.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478,140.21 : 28,259,641.01 = 11,185,705.71 : x
  2. Step 2: Convert to fraction form
    20,478,140.21/28,259,641.01 = 11,185,705.71/x
  3. Step 3: Cross multiply
    20,478,140.21x = 28,259,641.01 × 11,185,705.71
  4. Step 4: Simplify right side
    20,478,140.21x = 316,104,027,836,071.44
  5. Step 5: Solve for x
    x = 316,104,027,836,071.44/20,478,140.21
  6. Step 6: Final answer
    x = 15,436,168.74

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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.