Home / 13,124.45-18,111.75-7,156.13

Finding the Fourth Proportional to 13,124.45, 18,111.75 and 7,156.13

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Solution

The fourth proportional to 13,124.45, 18,111.75 and 7,156.13 is: 9,875.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.45 : 18,111.75 = 7,156.13 : x
  2. Step 2: Convert to fraction form
    13,124.45/18,111.75 = 7,156.13/x
  3. Step 3: Cross multiply
    13,124.45x = 18,111.75 × 7,156.13
  4. Step 4: Simplify right side
    13,124.45x = 129,610,037.53
  5. Step 5: Solve for x
    x = 129,610,037.53/13,124.45
  6. Step 6: Final answer
    x = 9,875.46

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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.