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Finding the Fourth Proportional to 19,950.18, 29,925.09 and 7,638.18

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Solution

The fourth proportional to 19,950.18, 29,925.09 and 7,638.18 is: 11,457.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,950.18 : 29,925.09 = 7,638.18 : x
  2. Step 2: Convert to fraction form
    19,950.18/29,925.09 = 7,638.18/x
  3. Step 3: Cross multiply
    19,950.18x = 29,925.09 × 7,638.18
  4. Step 4: Simplify right side
    19,950.18x = 228,573,223.94
  5. Step 5: Solve for x
    x = 228,573,223.94/19,950.18
  6. Step 6: Final answer
    x = 11,457.20

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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.