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Finding the Fourth Proportional to 22,897.40, 31,582.01 and 21,015.05

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Solution

The fourth proportional to 22,897.40, 31,582.01 and 21,015.05 is: 28,985.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,897.40 : 31,582.01 = 21,015.05 : x
  2. Step 2: Convert to fraction form
    22,897.40/31,582.01 = 21,015.05/x
  3. Step 3: Cross multiply
    22,897.40x = 31,582.01 × 21,015.05
  4. Step 4: Simplify right side
    22,897.40x = 663,697,413.88
  5. Step 5: Solve for x
    x = 663,697,413.88/22,897.40
  6. Step 6: Final answer
    x = 28,985.72

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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.