Home / 21,430.50-29,587.05-13,991.46

Finding the Fourth Proportional to 21,430.50, 29,587.05 and 13,991.46

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Solution

The fourth proportional to 21,430.50, 29,587.05 and 13,991.46 is: 19,316.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.50 : 29,587.05 = 13,991.46 : x
  2. Step 2: Convert to fraction form
    21,430.50/29,587.05 = 13,991.46/x
  3. Step 3: Cross multiply
    21,430.50x = 29,587.05 × 13,991.46
  4. Step 4: Simplify right side
    21,430.50x = 413,966,026.59
  5. Step 5: Solve for x
    x = 413,966,026.59/21,430.50
  6. Step 6: Final answer
    x = 19,316.68

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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.