Home / 15,390.51-21,246.62-11,980.01

Finding the Fourth Proportional to 15,390.51, 21,246.62 and 11,980.01

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Solution

The fourth proportional to 15,390.51, 21,246.62 and 11,980.01 is: 16,538.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.51 : 21,246.62 = 11,980.01 : x
  2. Step 2: Convert to fraction form
    15,390.51/21,246.62 = 11,980.01/x
  3. Step 3: Cross multiply
    15,390.51x = 21,246.62 × 11,980.01
  4. Step 4: Simplify right side
    15,390.51x = 254,534,720.07
  5. Step 5: Solve for x
    x = 254,534,720.07/15,390.51
  6. Step 6: Final answer
    x = 16,538.42

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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.