Home / 15,307.77-21,112.19-10,785.44

Finding the Fourth Proportional to 15,307.77, 21,112.19 and 10,785.44

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Solution

The fourth proportional to 15,307.77, 21,112.19 and 10,785.44 is: 14,875.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,307.77 : 21,112.19 = 10,785.44 : x
  2. Step 2: Convert to fraction form
    15,307.77/21,112.19 = 10,785.44/x
  3. Step 3: Cross multiply
    15,307.77x = 21,112.19 × 10,785.44
  4. Step 4: Simplify right side
    15,307.77x = 227,704,099.03
  5. Step 5: Solve for x
    x = 227,704,099.03/15,307.77
  6. Step 6: Final answer
    x = 14,875.07

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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.