Home / 20,810.60-31,212.30-7,656.20

Finding the Fourth Proportional to 20,810.60, 31,212.30 and 7,656.20

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Solution

The fourth proportional to 20,810.60, 31,212.30 and 7,656.20 is: 11,482.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.60 : 31,212.30 = 7,656.20 : x
  2. Step 2: Convert to fraction form
    20,810.60/31,212.30 = 7,656.20/x
  3. Step 3: Cross multiply
    20,810.60x = 31,212.30 × 7,656.20
  4. Step 4: Simplify right side
    20,810.60x = 238,967,611.26
  5. Step 5: Solve for x
    x = 238,967,611.26/20,810.60
  6. Step 6: Final answer
    x = 11,482.98

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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.