Home / 21,412.04-29,548.70-11,980.60

Finding the Fourth Proportional to 21,412.04, 29,548.70 and 11,980.60

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Solution

The fourth proportional to 21,412.04, 29,548.70 and 11,980.60 is: 16,533.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.04 : 29,548.70 = 11,980.60 : x
  2. Step 2: Convert to fraction form
    21,412.04/29,548.70 = 11,980.60/x
  3. Step 3: Cross multiply
    21,412.04x = 29,548.70 × 11,980.60
  4. Step 4: Simplify right side
    21,412.04x = 354,011,155.22
  5. Step 5: Solve for x
    x = 354,011,155.22/21,412.04
  6. Step 6: Final answer
    x = 16,533.28

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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.