Home / 20,985.90-28,958.67-12,032.70

Finding the Fourth Proportional to 20,985.90, 28,958.67 and 12,032.70

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Solution

The fourth proportional to 20,985.90, 28,958.67 and 12,032.70 is: 16,604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.90 : 28,958.67 = 12,032.70 : x
  2. Step 2: Convert to fraction form
    20,985.90/28,958.67 = 12,032.70/x
  3. Step 3: Cross multiply
    20,985.90x = 28,958.67 × 12,032.70
  4. Step 4: Simplify right side
    20,985.90x = 348,450,988.51
  5. Step 5: Solve for x
    x = 348,450,988.51/20,985.90
  6. Step 6: Final answer
    x = 16,604.05

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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.