Home / 15,621.40-21,557.43-8,547.80

Finding the Fourth Proportional to 15,621.40, 21,557.43 and 8,547.80

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Solution

The fourth proportional to 15,621.40, 21,557.43 and 8,547.80 is: 11,795.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.40 : 21,557.43 = 8,547.80 : x
  2. Step 2: Convert to fraction form
    15,621.40/21,557.43 = 8,547.80/x
  3. Step 3: Cross multiply
    15,621.40x = 21,557.43 × 8,547.80
  4. Step 4: Simplify right side
    15,621.40x = 184,268,600.15
  5. Step 5: Solve for x
    x = 184,268,600.15/15,621.40
  6. Step 6: Final answer
    x = 11,795.91

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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.