Home / 15,621.47-21,557.63-8,547.89

Finding the Fourth Proportional to 15,621.47, 21,557.63 and 8,547.89

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Solution

The fourth proportional to 15,621.47, 21,557.63 and 8,547.89 is: 11,796.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.47 : 21,557.63 = 8,547.89 : x
  2. Step 2: Convert to fraction form
    15,621.47/21,557.63 = 8,547.89/x
  3. Step 3: Cross multiply
    15,621.47x = 21,557.63 × 8,547.89
  4. Step 4: Simplify right side
    15,621.47x = 184,272,293.11
  5. Step 5: Solve for x
    x = 184,272,293.11/15,621.47
  6. Step 6: Final answer
    x = 11,796.09

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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.