Home / 20,421,037.02-28,181,036.93-11,128,609.63

Finding the Fourth Proportional to 20,421,037.02, 28,181,036.93 and 11,128,609.63

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Solution

The fourth proportional to 20,421,037.02, 28,181,036.93 and 11,128,609.63 is: 15,357,484.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,037.02 : 28,181,036.93 = 11,128,609.63 : x
  2. Step 2: Convert to fraction form
    20,421,037.02/28,181,036.93 = 11,128,609.63/x
  3. Step 3: Cross multiply
    20,421,037.02x = 28,181,036.93 × 11,128,609.63
  4. Step 4: Simplify right side
    20,421,037.02x = 313,615,758,962,583.62
  5. Step 5: Solve for x
    x = 313,615,758,962,583.62/20,421,037.02
  6. Step 6: Final answer
    x = 15,357,484.47

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Double scale
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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.