Home / 20,386.12-28,130.34-12,001

Finding the Fourth Proportional to 20,386.12, 28,130.34 and 12,001

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Solution

The fourth proportional to 20,386.12, 28,130.34 and 12,001 is: 16,559.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.12 : 28,130.34 = 12,001 : x
  2. Step 2: Convert to fraction form
    20,386.12/28,130.34 = 12,001/x
  3. Step 3: Cross multiply
    20,386.12x = 28,130.34 × 12,001
  4. Step 4: Simplify right side
    20,386.12x = 337,592,210.34
  5. Step 5: Solve for x
    x = 337,592,210.34/20,386.12
  6. Step 6: Final answer
    x = 16,559.90

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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.