Home / 21,430.90-29,574.61-11,999.53

Finding the Fourth Proportional to 21,430.90, 29,574.61 and 11,999.53

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Solution

The fourth proportional to 21,430.90, 29,574.61 and 11,999.53 is: 16,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.90 : 29,574.61 = 11,999.53 : x
  2. Step 2: Convert to fraction form
    21,430.90/29,574.61 = 11,999.53/x
  3. Step 3: Cross multiply
    21,430.90x = 29,574.61 × 11,999.53
  4. Step 4: Simplify right side
    21,430.90x = 354,881,419.93
  5. Step 5: Solve for x
    x = 354,881,419.93/21,430.90
  6. Step 6: Final answer
    x = 16,559.33

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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.