Home / 21,271.68-29,354.40-11,840.40

Finding the Fourth Proportional to 21,271.68, 29,354.40 and 11,840.40

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Solution

The fourth proportional to 21,271.68, 29,354.40 and 11,840.40 is: 16,339.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.68 : 29,354.40 = 11,840.40 : x
  2. Step 2: Convert to fraction form
    21,271.68/29,354.40 = 11,840.40/x
  3. Step 3: Cross multiply
    21,271.68x = 29,354.40 × 11,840.40
  4. Step 4: Simplify right side
    21,271.68x = 347,567,837.76
  5. Step 5: Solve for x
    x = 347,567,837.76/21,271.68
  6. Step 6: Final answer
    x = 16,339.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.