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Finding the Fourth Proportional to 35,715.90, 53,537.40 and 20,917.20

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Solution

The fourth proportional to 35,715.90, 53,537.40 and 20,917.20 is: 31,354.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,715.90 : 53,537.40 = 20,917.20 : x
  2. Step 2: Convert to fraction form
    35,715.90/53,537.40 = 20,917.20/x
  3. Step 3: Cross multiply
    35,715.90x = 53,537.40 × 20,917.20
  4. Step 4: Simplify right side
    35,715.90x = 1,119,852,503.28
  5. Step 5: Solve for x
    x = 1,119,852,503.28/35,715.90
  6. Step 6: Final answer
    x = 31,354.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.