Home / 21,980.17-32,969.84-6,987.20

Finding the Fourth Proportional to 21,980.17, 32,969.84 and 6,987.20

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Solution

The fourth proportional to 21,980.17, 32,969.84 and 6,987.20 is: 10,480.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.17 : 32,969.84 = 6,987.20 : x
  2. Step 2: Convert to fraction form
    21,980.17/32,969.84 = 6,987.20/x
  3. Step 3: Cross multiply
    21,980.17x = 32,969.84 × 6,987.20
  4. Step 4: Simplify right side
    21,980.17x = 230,366,831.11
  5. Step 5: Solve for x
    x = 230,366,831.11/21,980.17
  6. Step 6: Final answer
    x = 10,480.67

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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.