Home / 20,783.12-31,170.93-5,988.40

Finding the Fourth Proportional to 20,783.12, 31,170.93 and 5,988.40

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Solution

The fourth proportional to 20,783.12, 31,170.93 and 5,988.40 is: 8,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.12 : 31,170.93 = 5,988.40 : x
  2. Step 2: Convert to fraction form
    20,783.12/31,170.93 = 5,988.40/x
  3. Step 3: Cross multiply
    20,783.12x = 31,170.93 × 5,988.40
  4. Step 4: Simplify right side
    20,783.12x = 186,663,896.83
  5. Step 5: Solve for x
    x = 186,663,896.83/20,783.12
  6. Step 6: Final answer
    x = 8,981.52

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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.