Home / 15,509.02-21,402.39-8,435.74

Finding the Fourth Proportional to 15,509.02, 21,402.39 and 8,435.74

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Solution

The fourth proportional to 15,509.02, 21,402.39 and 8,435.74 is: 11,641.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.02 : 21,402.39 = 8,435.74 : x
  2. Step 2: Convert to fraction form
    15,509.02/21,402.39 = 8,435.74/x
  3. Step 3: Cross multiply
    15,509.02x = 21,402.39 × 8,435.74
  4. Step 4: Simplify right side
    15,509.02x = 180,544,997.42
  5. Step 5: Solve for x
    x = 180,544,997.42/15,509.02
  6. Step 6: Final answer
    x = 11,641.29

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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.