Home / 21,001.16-31,501.74-19,718.12

Finding the Fourth Proportional to 21,001.16, 31,501.74 and 19,718.12

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Solution

The fourth proportional to 21,001.16, 31,501.74 and 19,718.12 is: 29,577.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.16 : 31,501.74 = 19,718.12 : x
  2. Step 2: Convert to fraction form
    21,001.16/31,501.74 = 19,718.12/x
  3. Step 3: Cross multiply
    21,001.16x = 31,501.74 × 19,718.12
  4. Step 4: Simplify right side
    21,001.16x = 621,155,089.53
  5. Step 5: Solve for x
    x = 621,155,089.53/21,001.16
  6. Step 6: Final answer
    x = 29,577.18

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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.