Home / 31,010.80-46,516.20-21,031.60

Finding the Fourth Proportional to 31,010.80, 46,516.20 and 21,031.60

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Solution

The fourth proportional to 31,010.80, 46,516.20 and 21,031.60 is: 31,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,010.80 : 46,516.20 = 21,031.60 : x
  2. Step 2: Convert to fraction form
    31,010.80/46,516.20 = 21,031.60/x
  3. Step 3: Cross multiply
    31,010.80x = 46,516.20 × 21,031.60
  4. Step 4: Simplify right side
    31,010.80x = 978,310,111.92
  5. Step 5: Solve for x
    x = 978,310,111.92/31,010.80
  6. Step 6: Final answer
    x = 31,547.40

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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.