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Finding the Fourth Proportional to 19,359.90, 28,996.65 and 15,903.90

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Solution

The fourth proportional to 19,359.90, 28,996.65 and 15,903.90 is: 23,820.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,359.90 : 28,996.65 = 15,903.90 : x
  2. Step 2: Convert to fraction form
    19,359.90/28,996.65 = 15,903.90/x
  3. Step 3: Cross multiply
    19,359.90x = 28,996.65 × 15,903.90
  4. Step 4: Simplify right side
    19,359.90x = 461,159,821.94
  5. Step 5: Solve for x
    x = 461,159,821.94/19,359.90
  6. Step 6: Final answer
    x = 23,820.36

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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.