Home / 19,938.59-29,907.93-18,720.71

Finding the Fourth Proportional to 19,938.59, 29,907.93 and 18,720.71

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Solution

The fourth proportional to 19,938.59, 29,907.93 and 18,720.71 is: 28,081.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,938.59 : 29,907.93 = 18,720.71 : x
  2. Step 2: Convert to fraction form
    19,938.59/29,907.93 = 18,720.71/x
  3. Step 3: Cross multiply
    19,938.59x = 29,907.93 × 18,720.71
  4. Step 4: Simplify right side
    19,938.59x = 559,897,684.23
  5. Step 5: Solve for x
    x = 559,897,684.23/19,938.59
  6. Step 6: Final answer
    x = 28,081.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.