Home / 21,412.15-29,548.80-11,980.71

Finding the Fourth Proportional to 21,412.15, 29,548.80 and 11,980.71

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Solution

The fourth proportional to 21,412.15, 29,548.80 and 11,980.71 is: 16,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.15 : 29,548.80 = 11,980.71 : x
  2. Step 2: Convert to fraction form
    21,412.15/29,548.80 = 11,980.71/x
  3. Step 3: Cross multiply
    21,412.15x = 29,548.80 × 11,980.71
  4. Step 4: Simplify right side
    21,412.15x = 354,015,603.65
  5. Step 5: Solve for x
    x = 354,015,603.65/21,412.15
  6. Step 6: Final answer
    x = 16,533.40

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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.