Home / 31,023.45-42,798.51-20,948.67

Finding the Fourth Proportional to 31,023.45, 42,798.51 and 20,948.67

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Solution

The fourth proportional to 31,023.45, 42,798.51 and 20,948.67 is: 28,899.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,023.45 : 42,798.51 = 20,948.67 : x
  2. Step 2: Convert to fraction form
    31,023.45/42,798.51 = 20,948.67/x
  3. Step 3: Cross multiply
    31,023.45x = 42,798.51 × 20,948.67
  4. Step 4: Simplify right side
    31,023.45x = 896,571,862.48
  5. Step 5: Solve for x
    x = 896,571,862.48/31,023.45
  6. Step 6: Final answer
    x = 28,899.81

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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.