Home / 13,128.32-18,116.51-7,160.01

Finding the Fourth Proportional to 13,128.32, 18,116.51 and 7,160.01

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Solution

The fourth proportional to 13,128.32, 18,116.51 and 7,160.01 is: 9,880.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.32 : 18,116.51 = 7,160.01 : x
  2. Step 2: Convert to fraction form
    13,128.32/18,116.51 = 7,160.01/x
  3. Step 3: Cross multiply
    13,128.32x = 18,116.51 × 7,160.01
  4. Step 4: Simplify right side
    13,128.32x = 129,714,356.97
  5. Step 5: Solve for x
    x = 129,714,356.97/13,128.32
  6. Step 6: Final answer
    x = 9,880.50

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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.