Home / 20,570.82-30,856.40-4,988.45

Finding the Fourth Proportional to 20,570.82, 30,856.40 and 4,988.45

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Solution

The fourth proportional to 20,570.82, 30,856.40 and 4,988.45 is: 7,482.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.82 : 30,856.40 = 4,988.45 : x
  2. Step 2: Convert to fraction form
    20,570.82/30,856.40 = 4,988.45/x
  3. Step 3: Cross multiply
    20,570.82x = 30,856.40 × 4,988.45
  4. Step 4: Simplify right side
    20,570.82x = 153,925,429.36
  5. Step 5: Solve for x
    x = 153,925,429.36/20,570.82
  6. Step 6: Final answer
    x = 7,482.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.