Home / 28,019.70-38,667.15-15,444.45

Finding the Fourth Proportional to 28,019.70, 38,667.15 and 15,444.45

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Solution

The fourth proportional to 28,019.70, 38,667.15 and 15,444.45 is: 21,313.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.70 : 38,667.15 = 15,444.45 : x
  2. Step 2: Convert to fraction form
    28,019.70/38,667.15 = 15,444.45/x
  3. Step 3: Cross multiply
    28,019.70x = 38,667.15 × 15,444.45
  4. Step 4: Simplify right side
    28,019.70x = 597,192,864.82
  5. Step 5: Solve for x
    x = 597,192,864.82/28,019.70
  6. Step 6: Final answer
    x = 21,313.32

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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.