Home / 15,709.02-21,678.46-8,635.28

Finding the Fourth Proportional to 15,709.02, 21,678.46 and 8,635.28

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Solution

The fourth proportional to 15,709.02, 21,678.46 and 8,635.28 is: 11,916.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.02 : 21,678.46 = 8,635.28 : x
  2. Step 2: Convert to fraction form
    15,709.02/21,678.46 = 8,635.28/x
  3. Step 3: Cross multiply
    15,709.02x = 21,678.46 × 8,635.28
  4. Step 4: Simplify right side
    15,709.02x = 187,199,572.07
  5. Step 5: Solve for x
    x = 187,199,572.07/15,709.02
  6. Step 6: Final answer
    x = 11,916.69

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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.