Home / 12,939.76-17,856.45-7,274.74

Finding the Fourth Proportional to 12,939.76, 17,856.45 and 7,274.74

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Solution

The fourth proportional to 12,939.76, 17,856.45 and 7,274.74 is: 10,038.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.76 : 17,856.45 = 7,274.74 : x
  2. Step 2: Convert to fraction form
    12,939.76/17,856.45 = 7,274.74/x
  3. Step 3: Cross multiply
    12,939.76x = 17,856.45 × 7,274.74
  4. Step 4: Simplify right side
    12,939.76x = 129,901,075.71
  5. Step 5: Solve for x
    x = 129,901,075.71/12,939.76
  6. Step 6: Final answer
    x = 10,038.91

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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.