Home / 13,280.47-18,328.13-7,615.75

Finding the Fourth Proportional to 13,280.47, 18,328.13 and 7,615.75

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Solution

The fourth proportional to 13,280.47, 18,328.13 and 7,615.75 is: 10,510.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.47 : 18,328.13 = 7,615.75 : x
  2. Step 2: Convert to fraction form
    13,280.47/18,328.13 = 7,615.75/x
  3. Step 3: Cross multiply
    13,280.47x = 18,328.13 × 7,615.75
  4. Step 4: Simplify right side
    13,280.47x = 139,582,456.05
  5. Step 5: Solve for x
    x = 139,582,456.05/13,280.47
  6. Step 6: Final answer
    x = 10,510.36

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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.