Home / 21,225.63-31,789.96-10,140.16

Finding the Fourth Proportional to 21,225.63, 31,789.96 and 10,140.16

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Solution

The fourth proportional to 21,225.63, 31,789.96 and 10,140.16 is: 15,187.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.63 : 31,789.96 = 10,140.16 : x
  2. Step 2: Convert to fraction form
    21,225.63/31,789.96 = 10,140.16/x
  3. Step 3: Cross multiply
    21,225.63x = 31,789.96 × 10,140.16
  4. Step 4: Simplify right side
    21,225.63x = 322,355,280.79
  5. Step 5: Solve for x
    x = 322,355,280.79/21,225.63
  6. Step 6: Final answer
    x = 15,187.08

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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.