Home / 13,140.04-18,133.10-7,171.80

Finding the Fourth Proportional to 13,140.04, 18,133.10 and 7,171.80

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Solution

The fourth proportional to 13,140.04, 18,133.10 and 7,171.80 is: 9,897.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.04 : 18,133.10 = 7,171.80 : x
  2. Step 2: Convert to fraction form
    13,140.04/18,133.10 = 7,171.80/x
  3. Step 3: Cross multiply
    13,140.04x = 18,133.10 × 7,171.80
  4. Step 4: Simplify right side
    13,140.04x = 130,046,966.58
  5. Step 5: Solve for x
    x = 130,046,966.58/13,140.04
  6. Step 6: Final answer
    x = 9,897.00

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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.