Home / 15,621.12-21,557.16-8,547.66

Finding the Fourth Proportional to 15,621.12, 21,557.16 and 8,547.66

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Solution

The fourth proportional to 15,621.12, 21,557.16 and 8,547.66 is: 11,795.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.12 : 21,557.16 = 8,547.66 : x
  2. Step 2: Convert to fraction form
    15,621.12/21,557.16 = 8,547.66/x
  3. Step 3: Cross multiply
    15,621.12x = 21,557.16 × 8,547.66
  4. Step 4: Simplify right side
    15,621.12x = 184,263,274.25
  5. Step 5: Solve for x
    x = 184,263,274.25/15,621.12
  6. Step 6: Final answer
    x = 11,795.78

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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.