Finding the Fourth Proportional to 21,405,303.36, 29,539,338.84 and 12,238,138.08
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Solution
The fourth proportional to 21,405,303.36, 29,539,338.84 and 12,238,138.08 is: 16,888,642.10
Step by Step Solution
- Step 1: Write the proportion equation
21,405,303.36 : 29,539,338.84 = 12,238,138.08 : x - Step 2: Convert to fraction form
21,405,303.36/29,539,338.84 = 12,238,138.08/x - Step 3: Cross multiply
21,405,303.36x = 29,539,338.84 × 12,238,138.08 - Step 4: Simplify right side
21,405,303.36x = 361,506,507,515,827 - Step 5: Solve for x
x = 361,506,507,515,827/21,405,303.36 - Step 6: Final answer
x = 16,888,642.10
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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.