Home / 28,178.84-38,887.97-15,603.59

Finding the Fourth Proportional to 28,178.84, 38,887.97 and 15,603.59

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Solution

The fourth proportional to 28,178.84, 38,887.97 and 15,603.59 is: 21,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.84 : 38,887.97 = 15,603.59 : x
  2. Step 2: Convert to fraction form
    28,178.84/38,887.97 = 15,603.59/x
  3. Step 3: Cross multiply
    28,178.84x = 38,887.97 × 15,603.59
  4. Step 4: Simplify right side
    28,178.84x = 606,791,667.35
  5. Step 5: Solve for x
    x = 606,791,667.35/28,178.84
  6. Step 6: Final answer
    x = 21,533.60

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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.