Home / 20,805.36-31,190.76-14,547.48

Finding the Fourth Proportional to 20,805.36, 31,190.76 and 14,547.48

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Solution

The fourth proportional to 20,805.36, 31,190.76 and 14,547.48 is: 21,809.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.36 : 31,190.76 = 14,547.48 : x
  2. Step 2: Convert to fraction form
    20,805.36/31,190.76 = 14,547.48/x
  3. Step 3: Cross multiply
    20,805.36x = 31,190.76 × 14,547.48
  4. Step 4: Simplify right side
    20,805.36x = 453,746,957.28
  5. Step 5: Solve for x
    x = 453,746,957.28/20,805.36
  6. Step 6: Final answer
    x = 21,809.14

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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.