Home / 15,621.27-21,557.31-8,547.68

Finding the Fourth Proportional to 15,621.27, 21,557.31 and 8,547.68

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Solution

The fourth proportional to 15,621.27, 21,557.31 and 8,547.68 is: 11,795.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.27 : 21,557.31 = 8,547.68 : x
  2. Step 2: Convert to fraction form
    15,621.27/21,557.31 = 8,547.68/x
  3. Step 3: Cross multiply
    15,621.27x = 21,557.31 × 8,547.68
  4. Step 4: Simplify right side
    15,621.27x = 184,264,879.75
  5. Step 5: Solve for x
    x = 184,264,879.75/15,621.27
  6. Step 6: Final answer
    x = 11,795.77

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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.