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Finding the Fourth Proportional to 9,985.58, 13,779.95 and 5,448.22

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Solution

The fourth proportional to 9,985.58, 13,779.95 and 5,448.22 is: 7,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.58 : 13,779.95 = 5,448.22 : x
  2. Step 2: Convert to fraction form
    9,985.58/13,779.95 = 5,448.22/x
  3. Step 3: Cross multiply
    9,985.58x = 13,779.95 × 5,448.22
  4. Step 4: Simplify right side
    9,985.58x = 75,076,199.19
  5. Step 5: Solve for x
    x = 75,076,199.19/9,985.58
  6. Step 6: Final answer
    x = 7,518.46

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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.