Home / 12,009.07-18,013.47-5,430.70

Finding the Fourth Proportional to 12,009.07, 18,013.47 and 5,430.70

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Solution

The fourth proportional to 12,009.07, 18,013.47 and 5,430.70 is: 8,145.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,009.07 : 18,013.47 = 5,430.70 : x
  2. Step 2: Convert to fraction form
    12,009.07/18,013.47 = 5,430.70/x
  3. Step 3: Cross multiply
    12,009.07x = 18,013.47 × 5,430.70
  4. Step 4: Simplify right side
    12,009.07x = 97,825,751.53
  5. Step 5: Solve for x
    x = 97,825,751.53/12,009.07
  6. Step 6: Final answer
    x = 8,145.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.