Home / 15,443.86-21,301.27-9,779.53

Finding the Fourth Proportional to 15,443.86, 21,301.27 and 9,779.53

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Solution

The fourth proportional to 15,443.86, 21,301.27 and 9,779.53 is: 13,488.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,443.86 : 21,301.27 = 9,779.53 : x
  2. Step 2: Convert to fraction form
    15,443.86/21,301.27 = 9,779.53/x
  3. Step 3: Cross multiply
    15,443.86x = 21,301.27 × 9,779.53
  4. Step 4: Simplify right side
    15,443.86x = 208,316,409.00
  5. Step 5: Solve for x
    x = 208,316,409.00/15,443.86
  6. Step 6: Final answer
    x = 13,488.62

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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.