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Finding the Fourth Proportional to 20,539.89, 30,663.95 and 19,810.89

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Solution

The fourth proportional to 20,539.89, 30,663.95 and 19,810.89 is: 29,575.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.89 : 30,663.95 = 19,810.89 : x
  2. Step 2: Convert to fraction form
    20,539.89/30,663.95 = 19,810.89/x
  3. Step 3: Cross multiply
    20,539.89x = 30,663.95 × 19,810.89
  4. Step 4: Simplify right side
    20,539.89x = 607,480,041.36
  5. Step 5: Solve for x
    x = 607,480,041.36/20,539.89
  6. Step 6: Final answer
    x = 29,575.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.