Home / 20,782.08-31,172.76-5,990.40

Finding the Fourth Proportional to 20,782.08, 31,172.76 and 5,990.40

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Solution

The fourth proportional to 20,782.08, 31,172.76 and 5,990.40 is: 8,985.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.08 : 31,172.76 = 5,990.40 : x
  2. Step 2: Convert to fraction form
    20,782.08/31,172.76 = 5,990.40/x
  3. Step 3: Cross multiply
    20,782.08x = 31,172.76 × 5,990.40
  4. Step 4: Simplify right side
    20,782.08x = 186,737,301.50
  5. Step 5: Solve for x
    x = 186,737,301.50/20,782.08
  6. Step 6: Final answer
    x = 8,985.50

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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.