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Finding the Fourth Proportional to 19,722.40, 29,540.40 and 17,130.40

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Solution

The fourth proportional to 19,722.40, 29,540.40 and 17,130.40 is: 25,658.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,722.40 : 29,540.40 = 17,130.40 : x
  2. Step 2: Convert to fraction form
    19,722.40/29,540.40 = 17,130.40/x
  3. Step 3: Cross multiply
    19,722.40x = 29,540.40 × 17,130.40
  4. Step 4: Simplify right side
    19,722.40x = 506,038,868.16
  5. Step 5: Solve for x
    x = 506,038,868.16/19,722.40
  6. Step 6: Final answer
    x = 25,658.08

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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.