Home / 13,407.36-18,500.80-7,438.08

Finding the Fourth Proportional to 13,407.36, 18,500.80 and 7,438.08

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Solution

The fourth proportional to 13,407.36, 18,500.80 and 7,438.08 is: 10,263.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407.36 : 18,500.80 = 7,438.08 : x
  2. Step 2: Convert to fraction form
    13,407.36/18,500.80 = 7,438.08/x
  3. Step 3: Cross multiply
    13,407.36x = 18,500.80 × 7,438.08
  4. Step 4: Simplify right side
    13,407.36x = 137,610,430.46
  5. Step 5: Solve for x
    x = 137,610,430.46/13,407.36
  6. Step 6: Final answer
    x = 10,263.80

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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.