Home / 19,720.09-27,216.30-13,019.77

Finding the Fourth Proportional to 19,720.09, 27,216.30 and 13,019.77

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Solution

The fourth proportional to 19,720.09, 27,216.30 and 13,019.77 is: 17,968.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.09 : 27,216.30 = 13,019.77 : x
  2. Step 2: Convert to fraction form
    19,720.09/27,216.30 = 13,019.77/x
  3. Step 3: Cross multiply
    19,720.09x = 27,216.30 × 13,019.77
  4. Step 4: Simplify right side
    19,720.09x = 354,349,966.25
  5. Step 5: Solve for x
    x = 354,349,966.25/19,720.09
  6. Step 6: Final answer
    x = 17,968.98

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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.