Home / 20,783.70-31,141.35-12,003.30

Finding the Fourth Proportional to 20,783.70, 31,141.35 and 12,003.30

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Solution

The fourth proportional to 20,783.70, 31,141.35 and 12,003.30 is: 17,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.70 : 31,141.35 = 12,003.30 : x
  2. Step 2: Convert to fraction form
    20,783.70/31,141.35 = 12,003.30/x
  3. Step 3: Cross multiply
    20,783.70x = 31,141.35 × 12,003.30
  4. Step 4: Simplify right side
    20,783.70x = 373,798,966.46
  5. Step 5: Solve for x
    x = 373,798,966.46/20,783.70
  6. Step 6: Final answer
    x = 17,985.20

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1.5x scale

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.