Home / 31,030.02-42,771.63-20,955.24

Finding the Fourth Proportional to 31,030.02, 42,771.63 and 20,955.24

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Solution

The fourth proportional to 31,030.02, 42,771.63 and 20,955.24 is: 28,884.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,030.02 : 42,771.63 = 20,955.24 : x
  2. Step 2: Convert to fraction form
    31,030.02/42,771.63 = 20,955.24/x
  3. Step 3: Cross multiply
    31,030.02x = 42,771.63 × 20,955.24
  4. Step 4: Simplify right side
    31,030.02x = 896,289,771.84
  5. Step 5: Solve for x
    x = 896,289,771.84/31,030.02
  6. Step 6: Final answer
    x = 28,884.60

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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.