Home / 20,603.51-28,428.07-13,901.57

Finding the Fourth Proportional to 20,603.51, 28,428.07 and 13,901.57

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Solution

The fourth proportional to 20,603.51, 28,428.07 and 13,901.57 is: 19,180.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.51 : 28,428.07 = 13,901.57 : x
  2. Step 2: Convert to fraction form
    20,603.51/28,428.07 = 13,901.57/x
  3. Step 3: Cross multiply
    20,603.51x = 28,428.07 × 13,901.57
  4. Step 4: Simplify right side
    20,603.51x = 395,194,628.18
  5. Step 5: Solve for x
    x = 395,194,628.18/20,603.51
  6. Step 6: Final answer
    x = 19,180.94

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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.