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Finding the Fourth Proportional to 47,009.80, 70,514.70 and 28,347.40

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Solution

The fourth proportional to 47,009.80, 70,514.70 and 28,347.40 is: 42,521.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,009.80 : 70,514.70 = 28,347.40 : x
  2. Step 2: Convert to fraction form
    47,009.80/70,514.70 = 28,347.40/x
  3. Step 3: Cross multiply
    47,009.80x = 70,514.70 × 28,347.40
  4. Step 4: Simplify right side
    47,009.80x = 1,998,908,406.78
  5. Step 5: Solve for x
    x = 1,998,908,406.78/47,009.80
  6. Step 6: Final answer
    x = 42,521.10

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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.