Home / 20,985.45-28,962.14-12,031.17

Finding the Fourth Proportional to 20,985.45, 28,962.14 and 12,031.17

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Solution

The fourth proportional to 20,985.45, 28,962.14 and 12,031.17 is: 16,604.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.45 : 28,962.14 = 12,031.17 : x
  2. Step 2: Convert to fraction form
    20,985.45/28,962.14 = 12,031.17/x
  3. Step 3: Cross multiply
    20,985.45x = 28,962.14 × 12,031.17
  4. Step 4: Simplify right side
    20,985.45x = 348,448,369.75
  5. Step 5: Solve for x
    x = 348,448,369.75/20,985.45
  6. Step 6: Final answer
    x = 16,604.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.