Home / 19,784.19-29,679.21-5,742.40

Finding the Fourth Proportional to 19,784.19, 29,679.21 and 5,742.40

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Solution

The fourth proportional to 19,784.19, 29,679.21 and 5,742.40 is: 8,614.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,784.19 : 29,679.21 = 5,742.40 : x
  2. Step 2: Convert to fraction form
    19,784.19/29,679.21 = 5,742.40/x
  3. Step 3: Cross multiply
    19,784.19x = 29,679.21 × 5,742.40
  4. Step 4: Simplify right side
    19,784.19x = 170,429,909.86
  5. Step 5: Solve for x
    x = 170,429,909.86/19,784.19
  6. Step 6: Final answer
    x = 8,614.45

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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.