Home / 40,386.07-55,734.02-21,990.40

Finding the Fourth Proportional to 40,386.07, 55,734.02 and 21,990.40

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Solution

The fourth proportional to 40,386.07, 55,734.02 and 21,990.40 is: 30,347.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,386.07 : 55,734.02 = 21,990.40 : x
  2. Step 2: Convert to fraction form
    40,386.07/55,734.02 = 21,990.40/x
  3. Step 3: Cross multiply
    40,386.07x = 55,734.02 × 21,990.40
  4. Step 4: Simplify right side
    40,386.07x = 1,225,613,226.58
  5. Step 5: Solve for x
    x = 1,225,613,226.58/40,386.07
  6. Step 6: Final answer
    x = 30,347.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.