Home / 13,085.45-18,057.53-7,420.71

Finding the Fourth Proportional to 13,085.45, 18,057.53 and 7,420.71

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Solution

The fourth proportional to 13,085.45, 18,057.53 and 7,420.71 is: 10,240.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.45 : 18,057.53 = 7,420.71 : x
  2. Step 2: Convert to fraction form
    13,085.45/18,057.53 = 7,420.71/x
  3. Step 3: Cross multiply
    13,085.45x = 18,057.53 × 7,420.71
  4. Step 4: Simplify right side
    13,085.45x = 133,999,779.71
  5. Step 5: Solve for x
    x = 133,999,779.71/13,085.45
  6. Step 6: Final answer
    x = 10,240.37

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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.