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Finding the Fourth Proportional to 35,345.60, 53,018.40 and 18,699.20

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Solution

The fourth proportional to 35,345.60, 53,018.40 and 18,699.20 is: 28,048.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,345.60 : 53,018.40 = 18,699.20 : x
  2. Step 2: Convert to fraction form
    35,345.60/53,018.40 = 18,699.20/x
  3. Step 3: Cross multiply
    35,345.60x = 53,018.40 × 18,699.20
  4. Step 4: Simplify right side
    35,345.60x = 991,401,665.28
  5. Step 5: Solve for x
    x = 991,401,665.28/35,345.60
  6. Step 6: Final answer
    x = 28,048.80

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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.