Home / 21,171.02-29,206.55-13,615.92

Finding the Fourth Proportional to 21,171.02, 29,206.55 and 13,615.92

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Solution

The fourth proportional to 21,171.02, 29,206.55 and 13,615.92 is: 18,783.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.02 : 29,206.55 = 13,615.92 : x
  2. Step 2: Convert to fraction form
    21,171.02/29,206.55 = 13,615.92/x
  3. Step 3: Cross multiply
    21,171.02x = 29,206.55 × 13,615.92
  4. Step 4: Simplify right side
    21,171.02x = 397,674,082.32
  5. Step 5: Solve for x
    x = 397,674,082.32/21,171.02
  6. Step 6: Final answer
    x = 18,783.89

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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.