Home / 20,870.58-31,316.15-9,775.35

Finding the Fourth Proportional to 20,870.58, 31,316.15 and 9,775.35

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Solution

The fourth proportional to 20,870.58, 31,316.15 and 9,775.35 is: 14,667.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.58 : 31,316.15 = 9,775.35 : x
  2. Step 2: Convert to fraction form
    20,870.58/31,316.15 = 9,775.35/x
  3. Step 3: Cross multiply
    20,870.58x = 31,316.15 × 9,775.35
  4. Step 4: Simplify right side
    20,870.58x = 306,126,326.90
  5. Step 5: Solve for x
    x = 306,126,326.90/20,870.58
  6. Step 6: Final answer
    x = 14,667.84

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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.