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Finding the Fourth Proportional to 12,386.99, 18,547.67 and 6,531.30

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Solution

The fourth proportional to 12,386.99, 18,547.67 and 6,531.30 is: 9,779.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.99 : 18,547.67 = 6,531.30 : x
  2. Step 2: Convert to fraction form
    12,386.99/18,547.67 = 6,531.30/x
  3. Step 3: Cross multiply
    12,386.99x = 18,547.67 × 6,531.30
  4. Step 4: Simplify right side
    12,386.99x = 121,140,397.07
  5. Step 5: Solve for x
    x = 121,140,397.07/12,386.99
  6. Step 6: Final answer
    x = 9,779.65

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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.