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Finding the Fourth Proportional to 29,038.30, 40,030.43 and 20,525.40

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Solution

The fourth proportional to 29,038.30, 40,030.43 and 20,525.40 is: 28,295.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,038.30 : 40,030.43 = 20,525.40 : x
  2. Step 2: Convert to fraction form
    29,038.30/40,030.43 = 20,525.40/x
  3. Step 3: Cross multiply
    29,038.30x = 40,030.43 × 20,525.40
  4. Step 4: Simplify right side
    29,038.30x = 821,640,500.67
  5. Step 5: Solve for x
    x = 821,640,500.67/29,038.30
  6. Step 6: Final answer
    x = 28,295.07

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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.