Home / 15,503.40-21,390.08-8,788.91

Finding the Fourth Proportional to 15,503.40, 21,390.08 and 8,788.91

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Solution

The fourth proportional to 15,503.40, 21,390.08 and 8,788.91 is: 12,126.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.40 : 21,390.08 = 8,788.91 : x
  2. Step 2: Convert to fraction form
    15,503.40/21,390.08 = 8,788.91/x
  3. Step 3: Cross multiply
    15,503.40x = 21,390.08 × 8,788.91
  4. Step 4: Simplify right side
    15,503.40x = 187,995,337.12
  5. Step 5: Solve for x
    x = 187,995,337.12/15,503.40
  6. Step 6: Final answer
    x = 12,126.07

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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.