Home / 15,445.19-21,316.64-9,780.45

Finding the Fourth Proportional to 15,445.19, 21,316.64 and 9,780.45

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Solution

The fourth proportional to 15,445.19, 21,316.64 and 9,780.45 is: 13,498.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.19 : 21,316.64 = 9,780.45 : x
  2. Step 2: Convert to fraction form
    15,445.19/21,316.64 = 9,780.45/x
  3. Step 3: Cross multiply
    15,445.19x = 21,316.64 × 9,780.45
  4. Step 4: Simplify right side
    15,445.19x = 208,486,322.75
  5. Step 5: Solve for x
    x = 208,486,322.75/15,445.19
  6. Step 6: Final answer
    x = 13,498.47

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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.