Home / 15,503.13-21,384.74-13,518.43

Finding the Fourth Proportional to 15,503.13, 21,384.74 and 13,518.43

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Solution

The fourth proportional to 15,503.13, 21,384.74 and 13,518.43 is: 18,647.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.13 : 21,384.74 = 13,518.43 : x
  2. Step 2: Convert to fraction form
    15,503.13/21,384.74 = 13,518.43/x
  3. Step 3: Cross multiply
    15,503.13x = 21,384.74 × 13,518.43
  4. Step 4: Simplify right side
    15,503.13x = 289,088,091.09
  5. Step 5: Solve for x
    x = 289,088,091.09/15,503.13
  6. Step 6: Final answer
    x = 18,647.08

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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.