Home / 13,140.29-18,133.48-7,171.91

Finding the Fourth Proportional to 13,140.29, 18,133.48 and 7,171.91

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Solution

The fourth proportional to 13,140.29, 18,133.48 and 7,171.91 is: 9,897.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.29 : 18,133.48 = 7,171.91 : x
  2. Step 2: Convert to fraction form
    13,140.29/18,133.48 = 7,171.91/x
  3. Step 3: Cross multiply
    13,140.29x = 18,133.48 × 7,171.91
  4. Step 4: Simplify right side
    13,140.29x = 130,051,666.50
  5. Step 5: Solve for x
    x = 130,051,666.50/13,140.29
  6. Step 6: Final answer
    x = 9,897.17

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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.