Home / 21,559.95-29,750.63-12,128.31

Finding the Fourth Proportional to 21,559.95, 29,750.63 and 12,128.31

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Solution

The fourth proportional to 21,559.95, 29,750.63 and 12,128.31 is: 16,735.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.95 : 29,750.63 = 12,128.31 : x
  2. Step 2: Convert to fraction form
    21,559.95/29,750.63 = 12,128.31/x
  3. Step 3: Cross multiply
    21,559.95x = 29,750.63 × 12,128.31
  4. Step 4: Simplify right side
    21,559.95x = 360,824,802.69
  5. Step 5: Solve for x
    x = 360,824,802.69/21,559.95
  6. Step 6: Final answer
    x = 16,735.88

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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.