Home / 40,065.02-55,288.05-21,915.45

Finding the Fourth Proportional to 40,065.02, 55,288.05 and 21,915.45

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Solution

The fourth proportional to 40,065.02, 55,288.05 and 21,915.45 is: 30,242.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,065.02 : 55,288.05 = 21,915.45 : x
  2. Step 2: Convert to fraction form
    40,065.02/55,288.05 = 21,915.45/x
  3. Step 3: Cross multiply
    40,065.02x = 55,288.05 × 21,915.45
  4. Step 4: Simplify right side
    40,065.02x = 1,211,662,495.37
  5. Step 5: Solve for x
    x = 1,211,662,495.37/40,065.02
  6. Step 6: Final answer
    x = 30,242.40

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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.