Home / 21,070.88-31,587.80-8,601.40

Finding the Fourth Proportional to 21,070.88, 31,587.80 and 8,601.40

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Solution

The fourth proportional to 21,070.88, 31,587.80 and 8,601.40 is: 12,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.88 : 31,587.80 = 8,601.40 : x
  2. Step 2: Convert to fraction form
    21,070.88/31,587.80 = 8,601.40/x
  3. Step 3: Cross multiply
    21,070.88x = 31,587.80 × 8,601.40
  4. Step 4: Simplify right side
    21,070.88x = 271,699,302.92
  5. Step 5: Solve for x
    x = 271,699,302.92/21,070.88
  6. Step 6: Final answer
    x = 12,894.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.