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Finding the Fourth Proportional to 30,547.76, 45,780.60 and 13,012.88

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Solution

The fourth proportional to 30,547.76, 45,780.60 and 13,012.88 is: 19,501.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,547.76 : 45,780.60 = 13,012.88 : x
  2. Step 2: Convert to fraction form
    30,547.76/45,780.60 = 13,012.88/x
  3. Step 3: Cross multiply
    30,547.76x = 45,780.60 × 13,012.88
  4. Step 4: Simplify right side
    30,547.76x = 595,737,454.13
  5. Step 5: Solve for x
    x = 595,737,454.13/30,547.76
  6. Step 6: Final answer
    x = 19,501.84

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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.