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Finding the Fourth Proportional to 35,988.86, 53,983.86 and 12,615.20

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Solution

The fourth proportional to 35,988.86, 53,983.86 and 12,615.20 is: 18,923.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,988.86 : 53,983.86 = 12,615.20 : x
  2. Step 2: Convert to fraction form
    35,988.86/53,983.86 = 12,615.20/x
  3. Step 3: Cross multiply
    35,988.86x = 53,983.86 × 12,615.20
  4. Step 4: Simplify right side
    35,988.86x = 681,017,190.67
  5. Step 5: Solve for x
    x = 681,017,190.67/35,988.86
  6. Step 6: Final answer
    x = 18,923.00

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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.