Home / 9,939.36-13,715.28-5,746.80

Finding the Fourth Proportional to 9,939.36, 13,715.28 and 5,746.80

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Solution

The fourth proportional to 9,939.36, 13,715.28 and 5,746.80 is: 7,929.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.36 : 13,715.28 = 5,746.80 : x
  2. Step 2: Convert to fraction form
    9,939.36/13,715.28 = 5,746.80/x
  3. Step 3: Cross multiply
    9,939.36x = 13,715.28 × 5,746.80
  4. Step 4: Simplify right side
    9,939.36x = 78,818,971.10
  5. Step 5: Solve for x
    x = 78,818,971.10/9,939.36
  6. Step 6: Final answer
    x = 7,929.98

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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.