Home / 10,128.48-15,181.20-4,922.40

Finding the Fourth Proportional to 10,128.48, 15,181.20 and 4,922.40

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Solution

The fourth proportional to 10,128.48, 15,181.20 and 4,922.40 is: 7,378.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.48 : 15,181.20 = 4,922.40 : x
  2. Step 2: Convert to fraction form
    10,128.48/15,181.20 = 4,922.40/x
  3. Step 3: Cross multiply
    10,128.48x = 15,181.20 × 4,922.40
  4. Step 4: Simplify right side
    10,128.48x = 74,727,938.88
  5. Step 5: Solve for x
    x = 74,727,938.88/10,128.48
  6. Step 6: Final answer
    x = 7,378.00

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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.