Home / 21,430.39-29,575.73-12,478.51

Finding the Fourth Proportional to 21,430.39, 29,575.73 and 12,478.51

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Solution

The fourth proportional to 21,430.39, 29,575.73 and 12,478.51 is: 17,221.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.39 : 29,575.73 = 12,478.51 : x
  2. Step 2: Convert to fraction form
    21,430.39/29,575.73 = 12,478.51/x
  3. Step 3: Cross multiply
    21,430.39x = 29,575.73 × 12,478.51
  4. Step 4: Simplify right side
    21,430.39x = 369,060,944.36
  5. Step 5: Solve for x
    x = 369,060,944.36/21,430.39
  6. Step 6: Final answer
    x = 17,221.38

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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.