Home / 21,240.04-31,864.08-10,147.60

Finding the Fourth Proportional to 21,240.04, 31,864.08 and 10,147.60

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Solution

The fourth proportional to 21,240.04, 31,864.08 and 10,147.60 is: 15,223.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.04 : 31,864.08 = 10,147.60 : x
  2. Step 2: Convert to fraction form
    21,240.04/31,864.08 = 10,147.60/x
  3. Step 3: Cross multiply
    21,240.04x = 31,864.08 × 10,147.60
  4. Step 4: Simplify right side
    21,240.04x = 323,343,938.21
  5. Step 5: Solve for x
    x = 323,343,938.21/21,240.04
  6. Step 6: Final answer
    x = 15,223.32

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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.