Home / 13,140.51-18,133.83-7,172.16

Finding the Fourth Proportional to 13,140.51, 18,133.83 and 7,172.16

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Solution

The fourth proportional to 13,140.51, 18,133.83 and 7,172.16 is: 9,897.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.51 : 18,133.83 = 7,172.16 : x
  2. Step 2: Convert to fraction form
    13,140.51/18,133.83 = 7,172.16/x
  3. Step 3: Cross multiply
    13,140.51x = 18,133.83 × 7,172.16
  4. Step 4: Simplify right side
    13,140.51x = 130,058,730.17
  5. Step 5: Solve for x
    x = 130,058,730.17/13,140.51
  6. Step 6: Final answer
    x = 9,897.54

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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.