Home / 15,630.58-21,570.32-8,557.12

Finding the Fourth Proportional to 15,630.58, 21,570.32 and 8,557.12

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Solution

The fourth proportional to 15,630.58, 21,570.32 and 8,557.12 is: 11,808.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.58 : 21,570.32 = 8,557.12 : x
  2. Step 2: Convert to fraction form
    15,630.58/21,570.32 = 8,557.12/x
  3. Step 3: Cross multiply
    15,630.58x = 21,570.32 × 8,557.12
  4. Step 4: Simplify right side
    15,630.58x = 184,579,666.04
  5. Step 5: Solve for x
    x = 184,579,666.04/15,630.58
  6. Step 6: Final answer
    x = 11,808.89

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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.