Home / 21,111.80-29,114.36-15,746.08

Finding the Fourth Proportional to 21,111.80, 29,114.36 and 15,746.08

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Solution

The fourth proportional to 21,111.80, 29,114.36 and 15,746.08 is: 21,714.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.80 : 29,114.36 = 15,746.08 : x
  2. Step 2: Convert to fraction form
    21,111.80/29,114.36 = 15,746.08/x
  3. Step 3: Cross multiply
    21,111.80x = 29,114.36 × 15,746.08
  4. Step 4: Simplify right side
    21,111.80x = 458,437,041.71
  5. Step 5: Solve for x
    x = 458,437,041.71/21,111.80
  6. Step 6: Final answer
    x = 21,714.73

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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.