Home / 13,458.16-18,570.80-7,489.36

Finding the Fourth Proportional to 13,458.16, 18,570.80 and 7,489.36

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Solution

The fourth proportional to 13,458.16, 18,570.80 and 7,489.36 is: 10,334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.16 : 18,570.80 = 7,489.36 : x
  2. Step 2: Convert to fraction form
    13,458.16/18,570.80 = 7,489.36/x
  3. Step 3: Cross multiply
    13,458.16x = 18,570.80 × 7,489.36
  4. Step 4: Simplify right side
    13,458.16x = 139,083,406.69
  5. Step 5: Solve for x
    x = 139,083,406.69/13,458.16
  6. Step 6: Final answer
    x = 10,334.50

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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.