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Finding the Fourth Proportional to 40,897.20, 61,345.80 and 21,214.20

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Solution

The fourth proportional to 40,897.20, 61,345.80 and 21,214.20 is: 31,821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,897.20 : 61,345.80 = 21,214.20 : x
  2. Step 2: Convert to fraction form
    40,897.20/61,345.80 = 21,214.20/x
  3. Step 3: Cross multiply
    40,897.20x = 61,345.80 × 21,214.20
  4. Step 4: Simplify right side
    40,897.20x = 1,301,402,070.36
  5. Step 5: Solve for x
    x = 1,301,402,070.36/40,897.20
  6. Step 6: Final answer
    x = 31,821.30

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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.