Home / 15,430.13-21,277.65-13,199.39

Finding the Fourth Proportional to 15,430.13, 21,277.65 and 13,199.39

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Solution

The fourth proportional to 15,430.13, 21,277.65 and 13,199.39 is: 18,201.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.13 : 21,277.65 = 13,199.39 : x
  2. Step 2: Convert to fraction form
    15,430.13/21,277.65 = 13,199.39/x
  3. Step 3: Cross multiply
    15,430.13x = 21,277.65 × 13,199.39
  4. Step 4: Simplify right side
    15,430.13x = 280,852,000.63
  5. Step 5: Solve for x
    x = 280,852,000.63/15,430.13
  6. Step 6: Final answer
    x = 18,201.53

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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.