Home / 21,051.72-29,038.77-15,379.54

Finding the Fourth Proportional to 21,051.72, 29,038.77 and 15,379.54

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Solution

The fourth proportional to 21,051.72, 29,038.77 and 15,379.54 is: 21,214.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.72 : 29,038.77 = 15,379.54 : x
  2. Step 2: Convert to fraction form
    21,051.72/29,038.77 = 15,379.54/x
  3. Step 3: Cross multiply
    21,051.72x = 29,038.77 × 15,379.54
  4. Step 4: Simplify right side
    21,051.72x = 446,602,852.17
  5. Step 5: Solve for x
    x = 446,602,852.17/21,051.72
  6. Step 6: Final answer
    x = 21,214.55

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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.