Home / 20,690.32-31,030.16-7,541.60

Finding the Fourth Proportional to 20,690.32, 31,030.16 and 7,541.60

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Solution

The fourth proportional to 20,690.32, 31,030.16 and 7,541.60 is: 11,310.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.32 : 31,030.16 = 7,541.60 : x
  2. Step 2: Convert to fraction form
    20,690.32/31,030.16 = 7,541.60/x
  3. Step 3: Cross multiply
    20,690.32x = 31,030.16 × 7,541.60
  4. Step 4: Simplify right side
    20,690.32x = 234,017,054.66
  5. Step 5: Solve for x
    x = 234,017,054.66/20,690.32
  6. Step 6: Final answer
    x = 11,310.46

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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.