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Finding the Fourth Proportional to 19,347.10, 28,999.05 and 11,031.10

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Solution

The fourth proportional to 19,347.10, 28,999.05 and 11,031.10 is: 16,534.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,347.10 : 28,999.05 = 11,031.10 : x
  2. Step 2: Convert to fraction form
    19,347.10/28,999.05 = 11,031.10/x
  3. Step 3: Cross multiply
    19,347.10x = 28,999.05 × 11,031.10
  4. Step 4: Simplify right side
    19,347.10x = 319,891,420.46
  5. Step 5: Solve for x
    x = 319,891,420.46/19,347.10
  6. Step 6: Final answer
    x = 16,534.33

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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.