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Finding the Fourth Proportional to 21,779.64, 32,655.42 and 9,307.80

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Solution

The fourth proportional to 21,779.64, 32,655.42 and 9,307.80 is: 13,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.64 : 32,655.42 = 9,307.80 : x
  2. Step 2: Convert to fraction form
    21,779.64/32,655.42 = 9,307.80/x
  3. Step 3: Cross multiply
    21,779.64x = 32,655.42 × 9,307.80
  4. Step 4: Simplify right side
    21,779.64x = 303,950,118.28
  5. Step 5: Solve for x
    x = 303,950,118.28/21,779.64
  6. Step 6: Final answer
    x = 13,955.70

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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.