Home / 10,520.40-15,784.20-4,681.20

Finding the Fourth Proportional to 10,520.40, 15,784.20 and 4,681.20

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Solution

The fourth proportional to 10,520.40, 15,784.20 and 4,681.20 is: 7,023.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.40 : 15,784.20 = 4,681.20 : x
  2. Step 2: Convert to fraction form
    10,520.40/15,784.20 = 4,681.20/x
  3. Step 3: Cross multiply
    10,520.40x = 15,784.20 × 4,681.20
  4. Step 4: Simplify right side
    10,520.40x = 73,888,997.04
  5. Step 5: Solve for x
    x = 73,888,997.04/10,520.40
  6. Step 6: Final answer
    x = 7,023.40

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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.