Home / 13,278.30-18,325.24-7,615.04

Finding the Fourth Proportional to 13,278.30, 18,325.24 and 7,615.04

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Solution

The fourth proportional to 13,278.30, 18,325.24 and 7,615.04 is: 10,509.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.30 : 18,325.24 = 7,615.04 : x
  2. Step 2: Convert to fraction form
    13,278.30/18,325.24 = 7,615.04/x
  3. Step 3: Cross multiply
    13,278.30x = 18,325.24 × 7,615.04
  4. Step 4: Simplify right side
    13,278.30x = 139,547,435.61
  5. Step 5: Solve for x
    x = 139,547,435.61/13,278.30
  6. Step 6: Final answer
    x = 10,509.44

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.