Home / 10,172.40-15,258.36-5,239.20

Finding the Fourth Proportional to 10,172.40, 15,258.36 and 5,239.20

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Solution

The fourth proportional to 10,172.40, 15,258.36 and 5,239.20 is: 7,858.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,172.40 : 15,258.36 = 5,239.20 : x
  2. Step 2: Convert to fraction form
    10,172.40/15,258.36 = 5,239.20/x
  3. Step 3: Cross multiply
    10,172.40x = 15,258.36 × 5,239.20
  4. Step 4: Simplify right side
    10,172.40x = 79,941,599.71
  5. Step 5: Solve for x
    x = 79,941,599.71/10,172.40
  6. Step 6: Final answer
    x = 7,858.68

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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.