Home / 48,636.16-72,900-20,547.76

Finding the Fourth Proportional to 48,636.16, 72,900 and 20,547.76

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Solution

The fourth proportional to 48,636.16, 72,900 and 20,547.76 is: 30,798.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,636.16 : 72,900 = 20,547.76 : x
  2. Step 2: Convert to fraction form
    48,636.16/72,900 = 20,547.76/x
  3. Step 3: Cross multiply
    48,636.16x = 72,900 × 20,547.76
  4. Step 4: Simplify right side
    48,636.16x = 1,497,931,704
  5. Step 5: Solve for x
    x = 1,497,931,704/48,636.16
  6. Step 6: Final answer
    x = 30,798.72

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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.