Home / 10,515.28-15,783.45-7,557.20

Finding the Fourth Proportional to 10,515.28, 15,783.45 and 7,557.20

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Solution

The fourth proportional to 10,515.28, 15,783.45 and 7,557.20 is: 11,343.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.28 : 15,783.45 = 7,557.20 : x
  2. Step 2: Convert to fraction form
    10,515.28/15,783.45 = 7,557.20/x
  3. Step 3: Cross multiply
    10,515.28x = 15,783.45 × 7,557.20
  4. Step 4: Simplify right side
    10,515.28x = 119,278,688.34
  5. Step 5: Solve for x
    x = 119,278,688.34/10,515.28
  6. Step 6: Final answer
    x = 11,343.37

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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.