Home / 21,430.56-32,145.54-12,999.07

Finding the Fourth Proportional to 21,430.56, 32,145.54 and 12,999.07

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Solution

The fourth proportional to 21,430.56, 32,145.54 and 12,999.07 is: 19,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.56 : 32,145.54 = 12,999.07 : x
  2. Step 2: Convert to fraction form
    21,430.56/32,145.54 = 12,999.07/x
  3. Step 3: Cross multiply
    21,430.56x = 32,145.54 × 12,999.07
  4. Step 4: Simplify right side
    21,430.56x = 417,862,124.65
  5. Step 5: Solve for x
    x = 417,862,124.65/21,430.56
  6. Step 6: Final answer
    x = 19,498.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.