Home / 21,780.21-32,668.56-6,985.17

Finding the Fourth Proportional to 21,780.21, 32,668.56 and 6,985.17

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Solution

The fourth proportional to 21,780.21, 32,668.56 and 6,985.17 is: 10,477.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.21 : 32,668.56 = 6,985.17 : x
  2. Step 2: Convert to fraction form
    21,780.21/32,668.56 = 6,985.17/x
  3. Step 3: Cross multiply
    21,780.21x = 32,668.56 × 6,985.17
  4. Step 4: Simplify right side
    21,780.21x = 228,195,445.26
  5. Step 5: Solve for x
    x = 228,195,445.26/21,780.21
  6. Step 6: Final answer
    x = 10,477.19

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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.