Home / 21,430.68-32,128.55-14,389.19

Finding the Fourth Proportional to 21,430.68, 32,128.55 and 14,389.19

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Solution

The fourth proportional to 21,430.68, 32,128.55 and 14,389.19 is: 21,572.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.68 : 32,128.55 = 14,389.19 : x
  2. Step 2: Convert to fraction form
    21,430.68/32,128.55 = 14,389.19/x
  3. Step 3: Cross multiply
    21,430.68x = 32,128.55 × 14,389.19
  4. Step 4: Simplify right side
    21,430.68x = 462,303,932.95
  5. Step 5: Solve for x
    x = 462,303,932.95/21,430.68
  6. Step 6: Final answer
    x = 21,572.06

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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.