Home / 20,549.79-28,378.30-19,430.31

Finding the Fourth Proportional to 20,549.79, 28,378.30 and 19,430.31

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Solution

The fourth proportional to 20,549.79, 28,378.30 and 19,430.31 is: 26,832.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.79 : 28,378.30 = 19,430.31 : x
  2. Step 2: Convert to fraction form
    20,549.79/28,378.30 = 19,430.31/x
  3. Step 3: Cross multiply
    20,549.79x = 28,378.30 × 19,430.31
  4. Step 4: Simplify right side
    20,549.79x = 551,399,024.38
  5. Step 5: Solve for x
    x = 551,399,024.38/20,549.79
  6. Step 6: Final answer
    x = 26,832.34

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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.