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Finding the Fourth Proportional to 35,720.88, 53,581.32 and 12,347.52

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Solution

The fourth proportional to 35,720.88, 53,581.32 and 12,347.52 is: 18,521.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,720.88 : 53,581.32 = 12,347.52 : x
  2. Step 2: Convert to fraction form
    35,720.88/53,581.32 = 12,347.52/x
  3. Step 3: Cross multiply
    35,720.88x = 53,581.32 × 12,347.52
  4. Step 4: Simplify right side
    35,720.88x = 661,596,420.33
  5. Step 5: Solve for x
    x = 661,596,420.33/35,720.88
  6. Step 6: Final answer
    x = 18,521.28

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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.